module Sequel::Model::InstanceMethods

Sequel::Model instance methods that implement basic model functionality.

Attributes

to_hash[R]

The hash of attribute values. Keys are symbols with the names of the underlying database columns.

Artist.new(:name=>'Bob').values # => {:name=>'Bob'}
Artist[1].values # => {:id=>1, :name=>'Jim', ...}
values[R]

The hash of attribute values. Keys are symbols with the names of the underlying database columns.

Artist.new(:name=>'Bob').values # => {:name=>'Bob'}
Artist[1].values # => {:id=>1, :name=>'Jim', ...}

Public Class Methods

new(values = {}, from_db = false) { |self| ... } click to toggle source

Creates new instance and passes the given values to set. If a block is given, yield the instance to the block unless from_db is true. This method runs the after_initialize hook after it has optionally yielded itself to the block.

Arguments:

values

should be a hash to pass to set.

from_db

only for backwards compatibility, forget it exists.

Artist.new(:name=>'Bob')

Artist.new do |a|
  a.name = 'Bob'
end
# File lib/sequel/model/base.rb, line 1021
def initialize(values = {}, from_db = false)
  if from_db
    Sequel::Deprecation.deprecate('Passing two arguments to Model.new', 'Please use Model.call instead')
    set_values(values)
  else
    @values = {}
    @new = true
    @modified = true
    initialize_set(values)
    changed_columns.clear 
    yield self if block_given?
  end
  after_initialize
end

Public Instance Methods

==(obj) click to toggle source

Alias of eql?

# File lib/sequel/model/base.rb, line 1064
def ==(obj)
  eql?(obj)
end
===(obj) click to toggle source

If pk is not nil, true only if the objects have the same class and pk. If pk is nil, false.

Artist[1] === Artist[1] # true
Artist.new === Artist.new # false
Artist[1].set(:name=>'Bob') == Artist[1] # => true
# File lib/sequel/model/base.rb, line 1074
def ===(obj)
  pk.nil? ? false : (obj.class == model) && (obj.pk == pk)
end
[](column) click to toggle source

Returns value of the column's attribute.

Artist[1][:id] #=> 1
# File lib/sequel/model/base.rb, line 1039
def [](column)
  @values[column]
end
[]=(column, value) click to toggle source

Sets the value for the given column. If typecasting is enabled for this object, typecast the value based on the column's type. If this is a new record or the typecasted value isn't the same as the current value for the column, mark the column as changed.

a = Artist.new
a[:name] = 'Bob'
a.values #=> {:name=>'Bob'}
# File lib/sequel/model/base.rb, line 1051
def []=(column, value)
  # If it is new, it doesn't have a value yet, so we should
  # definitely set the new value.
  # If the column isn't in @values, we can't assume it is
  # NULL in the database, so assume it has changed.
  v = typecast_value(column, value)
  vals = @values
  if new? || !vals.include?(column) || v != (c = vals[column]) || v.class != c.class
    change_column_value(column, v)
  end
end
autoincrementing_primary_key() click to toggle source

The autoincrementing primary key for this model object. Should be overridden if you have a composite primary key with one part of it being autoincrementing.

# File lib/sequel/model/base.rb, line 1089
def autoincrementing_primary_key
  primary_key
end
changed_columns() click to toggle source

The columns that have been updated. This isn't completely accurate, as it could contain columns whose values have not changed.

a = Artist[1]
a.changed_columns # => []
a.name = 'Bob'
a.changed_columns # => [:name]
# File lib/sequel/model/base.rb, line 1100
def changed_columns
  @changed_columns ||= []
end
delete() click to toggle source

Deletes and returns self. Does not run destroy hooks. Look into using destroy instead.

Artist[1].delete # DELETE FROM artists WHERE (id = 1)
# => #<Artist {:id=>1, ...}>
# File lib/sequel/model/base.rb, line 1109
def delete
  raise Sequel::Error, "can't delete frozen object" if frozen?
  _delete
  self
end
destroy(opts = {}) click to toggle source

Like delete but runs hooks before and after delete. If before_destroy returns false, returns false without deleting the object the the database. Otherwise, deletes the item from the database and returns self. Uses a transaction if use_transactions is true or if the :transaction option is given and true.

Artist[1].destroy # BEGIN; DELETE FROM artists WHERE (id = 1); COMMIT;
# => #<Artist {:id=>1, ...}>
# File lib/sequel/model/base.rb, line 1124
def destroy(opts = {})
  raise Sequel::Error, "can't destroy frozen object" if frozen?
  checked_save_failure(opts){checked_transaction(opts){_destroy(opts)}}
end
each(&block) click to toggle source

Iterates through all of the current values using each.

Album[1].each{|k, v| puts "#{k} => #{v}"}
# id => 1
# name => 'Bob'
# File lib/sequel/model/base.rb, line 1134
def each(&block)
  @values.each(&block)
end
eql?(obj) click to toggle source

Compares model instances by values.

Artist[1] == Artist[1] # => true
Artist.new == Artist.new # => true
Artist[1].set(:name=>'Bob') == Artist[1] # => false
# File lib/sequel/model/base.rb, line 1143
def eql?(obj)
  (obj.class == model) && (obj.values == @values)
end
errors() click to toggle source

Returns the validation errors associated with this object. See Errors.

# File lib/sequel/model/base.rb, line 1149
def errors
  @errors ||= errors_class.new
end
exists?() click to toggle source

Returns true when current instance exists, false otherwise. Generally an object that isn't new will exist unless it has been deleted. Uses a database query to check for existence, unless the model object is new, in which case this is always false.

Artist[1].exists? # SELECT 1 FROM artists WHERE (id = 1)
# => true
Artist.new.exists?
# => false
# File lib/sequel/model/base.rb, line 1163
def exists?
  new? ? false : !this.get(SQL::AliasedExpression.new(1, :one)).nil?
end
extend(mod) click to toggle source

Ignore the model's setter method cache when this instances extends a module, as the module may contain setter methods.

Calls superclass method
# File lib/sequel/model/base.rb, line 1169
def extend(mod)
  @singleton_setter_added = true
  super
end
freeze() click to toggle source

Freeze the object in such a way that it is still usable but not modifiable. Once an object is frozen, you cannot modify it's values, #changed_columns, errors, or dataset.

Calls superclass method
# File lib/sequel/model/base.rb, line 1177
def freeze
  values.freeze
  changed_columns.freeze
  errors
  validate
  errors.freeze
  this.freeze if !new? && model.primary_key
  super
end
hash() click to toggle source

Value that should be unique for objects with the same class and pk (if pk is not nil), or the same class and values (if pk is nil).

Artist[1].hash == Artist[1].hash # true
Artist[1].set(:name=>'Bob').hash == Artist[1].hash # true
Artist.new.hash == Artist.new.hash # true
Artist.new(:name=>'Bob').hash == Artist.new.hash # false
# File lib/sequel/model/base.rb, line 1194
def hash
  case primary_key
  when Array
    [model, !pk.all? ? @values : pk].hash
  when Symbol
    [model, pk.nil? ? @values : pk].hash
  else
    [model, @values].hash
  end
end
id() click to toggle source

Returns value for the :id attribute, even if the primary key is not id. To get the primary key value, use pk.

Artist[1].id # => 1
# File lib/sequel/model/base.rb, line 1209
def id
  @values[:id]
end
inspect() click to toggle source

Returns a string representation of the model instance including the class name and values.

# File lib/sequel/model/base.rb, line 1215
def inspect
  "#<#{model.name} @values=#{inspect_values}>"
end
keys() click to toggle source

Returns the keys in values. May not include all column names.

Artist.new.keys # => []
Artist.new(:name=>'Bob').keys # => [:name]
Artist[1].keys # => [:id, :name]
# File lib/sequel/model/base.rb, line 1224
def keys
  @values.keys
end
lock!() click to toggle source

Refresh this record using for_update unless this is a new record. Returns self. This can be used to make sure no other process is updating the record at the same time.

a = Artist[1]
Artist.db.transaction do
  a.lock!
  a.update(...)
end
# File lib/sequel/model/base.rb, line 1237
def lock!
  _refresh(this.for_update) unless new?
  self
end
marshallable!() click to toggle source

Remove elements of the model object that make marshalling fail. Returns self.

a = Artist[1]
a.marshallable!
Marshal.dump(a)
# File lib/sequel/model/base.rb, line 1247
def marshallable!
  @this = nil
  self
end
modified!(column=nil) click to toggle source

Explicitly mark the object as modified, so save_changes/update will run callbacks even if no columns have changed.

a = Artist[1]
a.save_changes # No callbacks run, as no changes
a.modified!
a.save_changes # Callbacks run, even though no changes made

If a column is given, specifically marked that column as modified, so that save_changes/update will include that column in the update. This should be used if you plan on mutating the column value instead of assigning a new column value:

a.modified!(:name)
a.name.gsub!(/[aeou]/, 'i')
# File lib/sequel/model/base.rb, line 1267
def modified!(column=nil)
  if column && !changed_columns.include?(column)
    changed_columns << column
  end
  @modified = true
end
modified?(column=nil) click to toggle source

Whether this object has been modified since last saved, used by #save_changes to determine whether changes should be saved. New values are always considered modified.

a = Artist[1]
a.modified? # => false
a.set(:name=>'Jim')
a.modified? # => true

If a column is given, specifically check if the given column has been modified:

a.modified?(:num_albums) # => false
a.num_albums = 10
a.modified?(:num_albums) # => true
# File lib/sequel/model/base.rb, line 1289
def modified?(column=nil)
  if column
    changed_columns.include?(column)
  else
    @modified || !changed_columns.empty?
  end
end
new?() click to toggle source

Returns true if the current instance represents a new record.

Artist.new.new? # => true
Artist[1].new? # => false
# File lib/sequel/model/base.rb, line 1301
def new?
  defined?(@new) ? @new : (@new = false)
end
pk() click to toggle source

Returns the primary key value identifying the model instance. Raises an Error if this model does not have a primary key. If the model has a composite primary key, returns an array of values.

Artist[1].pk # => 1
Artist[[1, 2]].pk # => [1, 2]
# File lib/sequel/model/base.rb, line 1311
def pk
  raise(Error, "No primary key is associated with this model") unless key = primary_key
  if key.is_a?(Array)
    vals = @values
    key.map{|k| vals[k]}
  else
    @values[key]
  end
end
pk_hash() click to toggle source

Returns a hash mapping the receivers primary key column(s) to their values.

Artist[1].pk_hash # => {:id=>1}
Artist[[1, 2]].pk_hash # => {:id1=>1, :id2=>2}
# File lib/sequel/model/base.rb, line 1325
def pk_hash
  model.primary_key_hash(pk)
end
refresh() click to toggle source

Reloads attributes from database and returns self. Also clears all #changed_columns information. Raises an Error if the record no longer exists in the database.

a = Artist[1]
a.name = 'Jim'
a.refresh
a.name # => 'Bob'
# File lib/sequel/model/base.rb, line 1337
def refresh
  raise Sequel::Error, "can't refresh frozen object" if frozen?
  _refresh(this)
  self
end
reload() click to toggle source

Alias of refresh, but not aliased directly to make overriding in a plugin easier.

# File lib/sequel/model/base.rb, line 1344
def reload
  refresh
end
save(*columns) click to toggle source

Creates or updates the record, after making sure the record is valid and before hooks execute successfully. Fails if:

  • the record is not valid, or

  • before_save returns false, or

  • the record is new and before_create returns false, or

  • the record is not new and before_update returns false.

If save fails and either raise_on_save_failure or the :raise_on_failure option is true, it raises ValidationFailed or HookFailed. Otherwise it returns nil.

If it succeeds, it returns self.

You can provide an optional list of columns to update, in which case it only updates those columns, or a options hash.

Takes the following options:

:changed

save all changed columns, instead of all columns or the columns given

:columns

array of specific columns that should be saved.

:raise_on_failure

set to true or false to override the current raise_on_save_failure setting

:server

set the server/shard on the object before saving, and use that server/shard in any transaction.

:transaction

set to true or false to override the current use_transactions setting

:validate

set to false to skip validation

# File lib/sequel/model/base.rb, line 1376
def save(*columns)
  raise Sequel::Error, "can't save frozen object" if frozen?
  opts = columns.last.is_a?(Hash) ? columns.pop : {}

  Sequel::Deprecation.deprecate('Passing columns as separate arguments to Model#save', 'Instead, provide a :columns option with the array of columns to save.') unless columns.empty?
  columns.concat(Array(opts[:columns])) if opts[:columns]

  set_server(opts[:server]) if opts[:server] 
  if opts[:validate] != false
    unless checked_save_failure(opts){_valid?(true, opts)}
      raise(ValidationFailed.new(self)) if raise_on_failure?(opts)
      return
    end
  end
  checked_save_failure(opts){checked_transaction(opts){_save(columns, opts)}}
end
save_changes(opts={}) click to toggle source

Saves only changed columns if the object has been modified. If the object has not been modified, returns nil. If unable to save, returns false unless raise_on_save_failure is true.

a = Artist[1]
a.save_changes # => nil
a.name = 'Jim'
a.save_changes # UPDATE artists SET name = 'Bob' WHERE (id = 1)
# => #<Artist {:id=>1, :name=>'Jim', ...}
# File lib/sequel/model/base.rb, line 1402
def save_changes(opts={})
  save(opts.merge(:changed=>true)) || false if modified? 
end
set(hash) click to toggle source

Updates the instance with the supplied values with support for virtual attributes, raising an exception if a value is used that doesn't have a setter method (or ignoring it if strict_param_setting = false). Does not save the record.

artist.set(:name=>'Jim')
artist.name # => 'Jim'
# File lib/sequel/model/base.rb, line 1413
def set(hash)
  set_restricted(hash, nil, nil)
end
set_all(hash) click to toggle source

Set all values using the entries in the hash, ignoring any setting of allowed_columns in the model.

Artist.set_allowed_columns(:num_albums)
artist.set_all(:name=>'Jim')
artist.name # => 'Jim'
# File lib/sequel/model/base.rb, line 1423
def set_all(hash)
  set_restricted(hash, false, false)
end
set_except(hash, *except) click to toggle source

Set all values using the entries in the hash, except for the keys given in except. You should probably use set_fields or set_only instead of this method, as blacklist approaches to security are a bad idea.

artist.set_except({:name=>'Jim'}, :hometown)
artist.name # => 'Jim'
# File lib/sequel/model/base.rb, line 1433
def set_except(hash, *except)
  Sequel::Deprecation.deprecate('Model#set_except', 'Please switch to Model#set_only or use the blacklist_security plugin')
  set_restricted(hash, false, except.flatten)
end
set_fields(hash, fields, opts=nil) click to toggle source

For each of the fields in the given array fields, call the setter method with the value of that hash entry for the field. Returns self.

You can provide an options hash, with the following options currently respected:

:missing

Can be set to :skip to skip missing entries or :raise to raise an Error for missing entries. The default behavior is not to check for missing entries, in which case the default value is used. To be friendly with most web frameworks, the missing check will also check for the string version of the argument in the hash if given a symbol.

Examples:

artist.set_fields({:name=>'Jim'}, [:name])
artist.name # => 'Jim'

artist.set_fields({:hometown=>'LA'}, [:name])
artist.name # => nil
artist.hometown # => 'Sac'

artist.name # => 'Jim'
artist.set_fields({}, [:name], :missing=>:skip)
artist.name # => 'Jim'

artist.name # => 'Jim'
artist.set_fields({}, [:name], :missing=>:raise)
# Sequel::Error raised
# File lib/sequel/model/base.rb, line 1464
def set_fields(hash, fields, opts=nil)
  opts = if opts
    model.default_set_fields_options.merge(opts)
  else
    model.default_set_fields_options
  end

  case opts[:missing]
  when :skip
    fields.each do |f|
      if hash.has_key?(f) 
        send("#{f}=", hash[f])
      elsif f.is_a?(Symbol) && hash.has_key?(sf = f.to_s)
        send("#{sf}=", hash[sf])
      end
    end
  when :raise
    fields.each do |f|
      if hash.has_key?(f)
        send("#{f}=", hash[f])
      elsif f.is_a?(Symbol) && hash.has_key?(sf = f.to_s)
        send("#{sf}=", hash[sf])
      else
        raise(Sequel::Error, "missing field in hash: #{f.inspect} not in #{hash.inspect}")
      end
    end
  else
    fields.each{|f| send("#{f}=", hash[f])}
  end
  self
end
set_only(hash, *only) click to toggle source

Set the values using the entries in the hash, only if the key is included in only. It may be a better idea to use set_fields instead of this method.

artist.set_only({:name=>'Jim'}, :name)
artist.name # => 'Jim'

artist.set_only({:hometown=>'LA'}, :name) # Raise Error
# File lib/sequel/model/base.rb, line 1504
def set_only(hash, *only)
  set_restricted(hash, only.flatten, false)
end
set_server(s) click to toggle source

Set the shard that this object is tied to. Returns self.

# File lib/sequel/model/base.rb, line 1509
def set_server(s)
  @server = s
  @this.opts[:server] = s if @this
  self
end
set_values(hash) click to toggle source

Replace the current values with hash. Should definitely not be used with untrusted input, and should probably not be called directly by user code.

# File lib/sequel/model/base.rb, line 1518
def set_values(hash)
  @values = hash
end
singleton_method_added(meth) click to toggle source

Clear the #setter_methods cache when a method is added

Calls superclass method
# File lib/sequel/model/base.rb, line 1523
def singleton_method_added(meth)
  @singleton_setter_added = true if meth.to_s =~ SETTER_METHOD_REGEXP
  super
end
this() click to toggle source

Returns (naked) dataset that should return only this instance.

Artist[1].this
# SELECT * FROM artists WHERE (id = 1) LIMIT 1
# File lib/sequel/model/base.rb, line 1532
def this
  @this ||= use_server(model.instance_dataset.filter(pk_hash))
end
update(hash) click to toggle source

Runs set with the passed hash and then runs save_changes.

artist.update(:name=>'Jim') # UPDATE artists SET name = 'Jim' WHERE (id = 1)
# File lib/sequel/model/base.rb, line 1539
def update(hash)
  update_restricted(hash, nil, nil)
end
update_all(hash) click to toggle source

Update all values using the entries in the hash, ignoring any setting of allowed_columns in the model.

Artist.set_allowed_columns(:num_albums)
artist.update_all(:name=>'Jim') # UPDATE artists SET name = 'Jim' WHERE (id = 1)
# File lib/sequel/model/base.rb, line 1548
def update_all(hash)
  update_restricted(hash, false, false)
end
update_except(hash, *except) click to toggle source

Update all values using the entries in the hash, except for the keys given in except. You should probably use update_fields or update_only instead of this method, as blacklist approaches to security are a bad idea.

artist.update_except({:name=>'Jim'}, :hometown) # UPDATE artists SET name = 'Jim' WHERE (id = 1)
# File lib/sequel/model/base.rb, line 1557
def update_except(hash, *except)
  Sequel::Deprecation.deprecate('Model#update_except', 'Please switch to Model#update_only or use the blacklist_security plugin')
  update_restricted(hash, false, except.flatten)
end
update_fields(hash, fields, opts=nil) click to toggle source

Update the instances values by calling set_fields with the arguments, then saves any changes to the record. Returns self.

artist.update_fields({:name=>'Jim'}, [:name])
# UPDATE artists SET name = 'Jim' WHERE (id = 1)

artist.update_fields({:hometown=>'LA'}, [:name])
# UPDATE artists SET name = NULL WHERE (id = 1)
# File lib/sequel/model/base.rb, line 1570
def update_fields(hash, fields, opts=nil)
  set_fields(hash, fields, opts)
  save_changes
end
update_only(hash, *only) click to toggle source

Update the values using the entries in the hash, only if the key is included in only. It may be a better idea to use update_fields instead of this method.

artist.update_only({:name=>'Jim'}, :name)
# UPDATE artists SET name = 'Jim' WHERE (id = 1)

artist.update_only({:hometown=>'LA'}, :name) # Raise Error
# File lib/sequel/model/base.rb, line 1583
def update_only(hash, *only)
  update_restricted(hash, only.flatten, false)
end
valid?(opts = {}) click to toggle source

Validates the object and returns true if no errors are reported.

artist(:name=>'Valid').valid? # => true
artist(:name=>'Invalid').valid? # => false
artist.errors.full_messages # => ['name cannot be Invalid']
# File lib/sequel/model/base.rb, line 1601
def valid?(opts = {})
  _valid?(false, opts)
end
validate() click to toggle source

Validates the object. If the object is invalid, errors should be added to the errors attribute. By default, does nothing, as all models are valid by default. See the “Model Validations” guide. for details about validation. Should not be called directly by user code, call valid? instead to check if an object is valid.

# File lib/sequel/model/base.rb, line 1593
def validate
end

Private Instance Methods

_delete() click to toggle source

Do the deletion of the object's dataset, and check that the row was actually deleted.

# File lib/sequel/model/base.rb, line 1609
def _delete
  n = _delete_without_checking
  raise(NoExistingObject, "Attempt to delete object did not result in a single row modification (Rows Deleted: #{n}, SQL: #{_delete_dataset.delete_sql})") if require_modification && n != 1
  n
end
_delete_dataset() click to toggle source

The dataset to use when deleting the object. The same as the object's dataset by default.

# File lib/sequel/model/base.rb, line 1617
def _delete_dataset
  this
end
_delete_without_checking() click to toggle source

Actually do the deletion of the object's dataset. Return the number of rows modified.

# File lib/sequel/model/base.rb, line 1623
def _delete_without_checking
  if sql = (m = model).fast_instance_delete_sql
    sql = sql.dup
    (ds = m.dataset).literal_append(sql, pk)
    ds.with_sql_delete(sql)
  else
    _delete_dataset.delete 
  end
end
_destroy(opts) click to toggle source

Internal destroy method, separted from destroy to allow running inside a transaction

# File lib/sequel/model/base.rb, line 1635
def _destroy(opts)
  sh = {:server=>this_server}
  db.after_rollback(sh){after_destroy_rollback} if uacr = use_after_commit_rollback
  called = false
  around_destroy do
    called = true
    raise_hook_failure(:before_destroy) if before_destroy == false
    _destroy_delete
    after_destroy
    true
  end
  raise_hook_failure(:around_destroy) unless called
  db.after_commit(sh){after_destroy_commit} if uacr
  self
end
_destroy_delete() click to toggle source

Internal delete method to call when destroying an object, separated from delete to allow you to override destroy's version without affecting delete.

# File lib/sequel/model/base.rb, line 1654
def _destroy_delete
  delete
end
_insert() click to toggle source

Insert the record into the database, returning the primary key if the record should be refreshed from the database.

# File lib/sequel/model/base.rb, line 1660
def _insert
  ds = _insert_dataset
  if !ds.opts[:select] and ds.supports_insert_select? and h = _insert_select_raw(ds)
    set_values(h)
    nil
  else
    iid = _insert_raw(ds)
    # if we have a regular primary key and it's not set in @values,
    # we assume it's the last inserted id
    if (pk = autoincrementing_primary_key) && pk.is_a?(Symbol) && !(vals = @values)[pk]
      vals[pk] = iid
    end
    pk
  end
end
_insert_dataset() click to toggle source

The dataset to use when inserting a new object. The same as the model's dataset by default.

# File lib/sequel/model/base.rb, line 1678
def _insert_dataset
  use_server(model.instance_dataset)
end
_insert_raw(ds) click to toggle source

Insert into the given dataset and return the primary key created (if any).

# File lib/sequel/model/base.rb, line 1683
def _insert_raw(ds)
  ds.insert(@values)
end
_insert_select_raw(ds) click to toggle source

Insert into the given dataset and return the hash of column values.

# File lib/sequel/model/base.rb, line 1688
def _insert_select_raw(ds)
  ds.insert_select(@values)
end
_refresh(dataset) click to toggle source

Refresh using a particular dataset, used inside save to make sure the same server is used for reading newly inserted values from the database

# File lib/sequel/model/base.rb, line 1694
def _refresh(dataset)
  set_values(_refresh_get(dataset) || raise(Error, "Record not found"))
  changed_columns.clear
end
_refresh_get(dataset) click to toggle source

Get the row of column data from the database.

# File lib/sequel/model/base.rb, line 1700
def _refresh_get(dataset)
  dataset.first
end
_save(columns, opts) click to toggle source

Internal version of save, split from save to allow running inside it's own transaction.

# File lib/sequel/model/base.rb, line 1706
def _save(columns, opts)
  sh = {:server=>this_server}
  db.after_rollback(sh){after_rollback} if uacr = use_after_commit_rollback
  was_new = false
  pk = nil
  called_save = false
  called_cu = false
  around_save do
    called_save = true
    raise_hook_failure(:before_save) if before_save == false
    if new?
      was_new = true
      around_create do
        called_cu = true
        raise_hook_failure(:before_create) if before_create == false
        pk = _insert
        @this = nil
        @new = false
        @was_new = true
        after_create
        true
      end
      raise_hook_failure(:around_create) unless called_cu
    else
      around_update do
        called_cu = true
        raise_hook_failure(:before_update) if before_update == false
        if columns.empty?
          @columns_updated = if opts[:changed]
            @values.reject{|k,v| !changed_columns.include?(k)}
          else
            _save_update_all_columns_hash
          end
          changed_columns.clear
        else # update only the specified columns
          @columns_updated = @values.reject{|k, v| !columns.include?(k)}
          changed_columns.reject!{|c| columns.include?(c)}
        end
        _update_columns(@columns_updated)
        @this = nil
        after_update
        true
      end
      raise_hook_failure(:around_update) unless called_cu
    end
    after_save
    true
  end
  raise_hook_failure(:around_save) unless called_save
  if was_new
    @was_new = nil
    pk ? _save_refresh : changed_columns.clear
  else
    @columns_updated = nil
  end
  @modified = false
  db.after_commit(sh){after_commit} if uacr
  self
end
_save_refresh() click to toggle source

Refresh the object after saving it, used to get default values of all columns. Separated from _save so it can be overridden to avoid the refresh.

# File lib/sequel/model/base.rb, line 1769
def _save_refresh
  _refresh(this.opts[:server] ? this : this.server(:default))
end
_save_update_all_columns_hash() click to toggle source

Return a hash of values used when saving all columns of an existing object (i.e. not passing specific columns to save or using update/save_changes). Defaults to all of the object's values except unmodified primary key columns, as some databases don't like you setting primary key values even to their existing values.

# File lib/sequel/model/base.rb, line 1779
def _save_update_all_columns_hash
  v = @values.dup
  Array(primary_key).each{|x| v.delete(x) unless changed_columns.include?(x)}
  v
end
_update(columns) click to toggle source

Update this instance's dataset with the supplied column hash, checking that only a single row was modified.

# File lib/sequel/model/base.rb, line 1794
def _update(columns)
  n = _update_without_checking(columns)
  raise(NoExistingObject, "Attempt to update object did not result in a single row modification (SQL: #{_update_dataset.update_sql(columns)})") if require_modification && n != 1
  n
end
_update_columns(columns) click to toggle source

Call _update with the given columns, if any are present. Plugins can override this method in order to update with additional columns, even when the column hash is initially empty.

# File lib/sequel/model/base.rb, line 1788
def _update_columns(columns)
  _update(columns) unless columns.empty?
end
_update_dataset() click to toggle source

The dataset to use when updating an object. The same as the object's dataset by default.

# File lib/sequel/model/base.rb, line 1802
def _update_dataset
  this
end
_update_without_checking(columns) click to toggle source

Update this instances dataset with the supplied column hash.

# File lib/sequel/model/base.rb, line 1807
def _update_without_checking(columns)
  _update_dataset.update(columns)
end
_valid?(raise_errors, opts) click to toggle source

Internal validation method. If raise_errors is true, hook failures will be raised as HookFailure exceptions. If it is false, false will be returned instead.

# File lib/sequel/model/base.rb, line 1814
def _valid?(raise_errors, opts)
  return errors.empty? if frozen?
  errors.clear
  called = false
  error = false
  around_validation do
    called = true
    if before_validation == false
      if raise_errors
        raise_hook_failure(:before_validation)
      else
        error = true
      end
      false
    else
      validate
      after_validation
      errors.empty?
    end
  end
  error = true unless called
  if error
    if raise_errors
      raise_hook_failure(:around_validation)
    else
      false
    end
  else
    errors.empty?
  end
end
change_column_value(column, value) click to toggle source

Change the value of the column to given value, recording the change.

# File lib/sequel/model/base.rb, line 1866
def change_column_value(column, value)
  cc = changed_columns
  cc << column unless cc.include?(column)
  @values[column] = value
end
checked_save_failure(opts) { || ... } click to toggle source

If not raising on failure, check for HookFailed being raised by yielding and swallow it.

# File lib/sequel/model/base.rb, line 1848
def checked_save_failure(opts)
  if raise_on_failure?(opts)
    yield
  else
    begin
      yield
    rescue HookFailed 
      nil
    end
  end
end
checked_transaction(opts={}) { || ... } click to toggle source

If transactions should be used, wrap the yield in a transaction block.

# File lib/sequel/model/base.rb, line 1861
def checked_transaction(opts={})
  use_transaction?(opts) ? db.transaction({:server=>this_server}.merge(opts)){yield} : yield
end
errors_class() click to toggle source

Default error class used for errors.

# File lib/sequel/model/base.rb, line 1873
def errors_class
  Errors
end
initialize_set(h) click to toggle source

Set the columns with the given hash. By default, the same as set, but exists so it can be overridden. This is called only for new records, before #changed_columns is cleared.

# File lib/sequel/model/base.rb, line 1880
def initialize_set(h)
  set(h) unless h.empty?
end
inspect_values() click to toggle source

Default inspection output for the values hash, overwrite to change what inspect displays.

# File lib/sequel/model/base.rb, line 1885
def inspect_values
  @values.inspect
end
raise_hook_failure(type) click to toggle source

Raise an error appropriate to the hook type. May be swallowed by #checked_save_failure depending on the raise_on_failure? setting.

# File lib/sequel/model/base.rb, line 1899
def raise_hook_failure(type)
  raise HookFailed.new("the #{type} hook failed", self)
end
raise_on_failure?(opts) click to toggle source

Whether to raise or return false if this action fails. If the :raise_on_failure option is present in the hash, use that, otherwise, fallback to the object's raise_on_save_failure (if set), or class's default (if not).

# File lib/sequel/model/base.rb, line 1893
def raise_on_failure?(opts)
  opts.fetch(:raise_on_failure, raise_on_save_failure)
end
schema_type_class(column) click to toggle source

Get the ruby class or classes related to the given column's type.

# File lib/sequel/model/base.rb, line 1904
def schema_type_class(column)
  if (sch = db_schema[column]) && (type = sch[:type])
    db.schema_type_class(type)
  end
end
set_restricted(hash, only, except) click to toggle source

Set the columns, filtered by the only and except arrays.

# File lib/sequel/model/base.rb, line 1911
def set_restricted(hash, only, except)
  return self if hash.empty?
  meths = if only.nil? && except.nil? && !@singleton_setter_added
    model.setter_methods
  else
    setter_methods(only, except)
  end
  strict = strict_param_setting
  hash.each do |k,v|
    m = "#{k}="
    if meths.include?(m)
      send(m, v)
    elsif strict
      # Avoid using respond_to? or creating symbols from user input
      if public_methods.map{|s| s.to_s}.include?(m)
        if Array(model.primary_key).map{|s| s.to_s}.member?(k.to_s) && model.restrict_primary_key?
          raise Error, "#{k} is a restricted primary key"
        else
          raise Error, "#{k} is a restricted column"
        end
      else
        raise Error, "method #{m} doesn't exist"
      end
    end
  end
  self
end
setter_methods(only, except) click to toggle source

Returns all methods that can be used for attribute assignment (those that end with =), modified by the only and except arguments:

  • only

    • false - Don't modify the results

    • nil - if the model has allowed_columns, use only these, otherwise, don't modify

    • Array - allow only the given methods to be used

  • except

    • false - Don't modify the results

    • nil - if the model has restricted_columns, remove these, otherwise, don't modify

    • Array - remove the given methods

only takes precedence over except, and if only is not used, certain methods are always restricted (RESTRICTED_SETTER_METHODS). The primary key is restricted by default as well, see Model.unrestrict_primary_key to change this.

# File lib/sequel/model/base.rb, line 1955
def setter_methods(only, except)
  only = only.nil? ? model.allowed_columns : only
  except = except.nil? ? model._restricted_columns : except
  if only
    only.map{|x| "#{x}="}
  else
    meths = methods.collect{|x| x.to_s}.grep(SETTER_METHOD_REGEXP) - RESTRICTED_SETTER_METHODS
    meths -= Array(primary_key).map{|x| "#{x}="} if primary_key && model.restrict_primary_key?
    meths -= except.map{|x| "#{x}="} if except
    meths
  end
end
this_server() click to toggle source

The server/shard that the model object's dataset uses, or :default if the model object's dataset does not have an associated shard.

# File lib/sequel/model/base.rb, line 1970
def this_server
  if (s = @server)
    s
  elsif (t = @this)
    t.opts[:server] || :default
  else
    model.dataset.opts[:server] || :default
  end
end
typecast_value(column, value) click to toggle source

Typecast the value to the column's type if typecasting. Calls the database's #typecast_value method, so database adapters can override/augment the handling for database specific column types.

# File lib/sequel/model/base.rb, line 1983
def typecast_value(column, value)
  return value unless typecast_on_assignment && db_schema && (col_schema = db_schema[column])
  value = nil if '' == value and typecast_empty_string_to_nil and col_schema[:type] and ![:string, :blob].include?(col_schema[:type])
  raise(InvalidValue, "nil/NULL is not allowed for the #{column} column") if raise_on_typecast_failure && value.nil? && (col_schema[:allow_null] == false)
  begin
    model.db.typecast_value(col_schema[:type], value)
  rescue InvalidValue
    raise_on_typecast_failure ? raise : value
  end
end
update_restricted(hash, only, except) click to toggle source

Set the columns, filtered by the only and except arrays.

# File lib/sequel/model/base.rb, line 1995
def update_restricted(hash, only, except)
  set_restricted(hash, only, except)
  save_changes
end
use_server(ds) click to toggle source

Set the given dataset to use the current object's shard.

# File lib/sequel/model/base.rb, line 2001
def use_server(ds)
  @server ? ds.server(@server) : ds
end
use_transaction?(opts = {}) click to toggle source

Whether to use a transaction for this action. If the :transaction option is present in the hash, use that, otherwise, fallback to the object's default (if set), or class's default (if not).

# File lib/sequel/model/base.rb, line 2008
def use_transaction?(opts = {})
  opts.fetch(:transaction, use_transactions)
end