class ActiveRecord::ConnectionAdapters::PostgreSQL::Table

Active Record PostgreSQL Adapter Table ↑

def exclusion_constraint(*args)

See {connection.add_exclusion_constraint}[rdoc-ref:SchemaStatements#add_exclusion_constraint]

t.exclusion_constraint("price WITH =, availability_range WITH &&", using: :gist, name: "price_check")

Adds an exclusion constraint. 
def exclusion_constraint(*args)
  @base.add_exclusion_constraint(name, *args)
end

def remove_exclusion_constraint(*args)

See {connection.remove_exclusion_constraint}[rdoc-ref:SchemaStatements#remove_exclusion_constraint]

t.remove_exclusion_constraint(name: "price_check")

Removes the given exclusion constraint from the table. 
def remove_exclusion_constraint(*args)
  @base.remove_exclusion_constraint(name, *args)
end

def remove_unique_constraint(*args)

See {connection.remove_unique_constraint}[rdoc-ref:SchemaStatements#remove_unique_constraint]

t.remove_unique_constraint(name: "unique_position")

Removes the given unique constraint from the table. 
def remove_unique_constraint(*args)
  @base.remove_unique_constraint(name, *args)
end

def unique_constraint(*args)

See {connection.add_unique_constraint}[rdoc-ref:SchemaStatements#add_unique_constraint]

t.unique_constraint(:position, name: 'unique_position', deferrable: :deferred)

Adds a unique constraint. 
def unique_constraint(*args)
  @base.add_unique_constraint(name, *args)
end