Class: Arel::Update

Inherits:

Compound

• Object
• Compound
• Arel::Update

Defined in:

lib/arel/algebra/relations/writes.rb,
lib/arel/engines/sql/relations/writes.rb

Instance Attribute Summary

Attributes inherited from Compound

#relation

Attributes included from Relation

#count

Instance Method Summary

• #call ⇒ Object
• #initialize(relation, assignments) ⇒ Update constructor

  A new instance of Update.

• #to_sql ⇒ Object

Methods inherited from Compound

#attributes, #build_query, #engine, #eql?, #hash, requires, #unoperated_rows

Methods included from Relation

#bind, #christener, #compiler, #exclusion_predicate_sql, #externalizable?, #externalize, #inclusion_predicate_sql, #join?, #primary_key, #session

Methods included from Relation::DefaultOperations

#attributes, #groupings, #havings, #inserts, #joins, #locked, #orders, #projections, #skipped, #sources, #taken, #wheres

Methods included from Relation::AttributeAccessable

#[], #find_attribute_matching_attribute, #find_attribute_matching_name, #position_of

Methods included from Relation::Operable

#alias, #join, #lock, #outer_join

Methods included from Relation::Operable::Writable

#delete, #insert, #update

Methods included from Relation::Enumerable

#each, #first

Constructor Details

#initialize(relation, assignments) ⇒ Update

Returns a new instance of Update.

# File 'lib/arel/algebra/relations/writes.rb', line 28

def initialize(relation, assignments)
  @relation, @assignments = relation, assignments.bind(relation)
end

Instance Method Details

#call ⇒ Object

# File 'lib/arel/algebra/relations/writes.rb', line 32

def call
  engine.update(self)
end

#to_sql ⇒ Object

# File 'lib/arel/engines/sql/relations/writes.rb', line 15

def to_sql
  compiler.update_sql
end