Active Record PostgreSQL Adapter Alter Table

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 335
def initialize(td)
  super
  @constraint_validations = []
  @exclusion_constraint_adds = []
  @exclusion_constraint_drops = []
  @unique_key_adds = []
  @unique_key_drops = []
end

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 348
def add_exclusion_constraint(expression, options)
  @exclusion_constraint_adds << @td.new_exclusion_constraint_definition(expression, options)
end

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 356
def add_unique_key(column_name, options)
  @unique_key_adds << @td.new_unique_key_definition(column_name, options)
end

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 352
def drop_exclusion_constraint(constraint_name)
  @exclusion_constraint_drops << constraint_name
end

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 360
def drop_unique_key(unique_key_name)
  @unique_key_drops << unique_key_name
end

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 344
def validate_constraint(name)
  @constraint_validations << name
end