WhereChain objects act as placeholder for queries in which where does not have any parameter. In this case, where must be chained with not to return a new relation.
Methods
Class Public methods
new(scope)
📝 Source code
# File activerecord/lib/active_record/relation/query_methods.rb, line 20
def initialize(scope)
@scope = scope
endInstance Public methods
not(opts, *rest)
Returns a new relation expressing WHERE + NOT condition according to the conditions in the arguments.
not accepts conditions as a string, array, or hash. See QueryMethods#where for more details on each format.
User.where.not("name = 'Jon'")
# SELECT * FROM users WHERE NOT (name = 'Jon')
User.where.not(["name = ?", "Jon"])
# SELECT * FROM users WHERE NOT (name = 'Jon')
User.where.not(name: "Jon")
# SELECT * FROM users WHERE name != 'Jon'
User.where.not(name: nil)
# SELECT * FROM users WHERE name IS NOT NULL
User.where.not(name: %w(Ko1 Nobu))
# SELECT * FROM users WHERE name NOT IN ('Ko1', 'Nobu')
User.where.not(name: "Jon", role: "admin")
# SELECT * FROM users WHERE name != 'Jon' AND role != 'admin'
📝 Source code
# File activerecord/lib/active_record/relation/query_methods.rb, line 47
def not(opts, *rest)
opts = sanitize_forbidden_attributes(opts)
where_clause = @scope.send(:where_clause_factory).build(opts, rest)
@scope.references!(PredicateBuilder.references(opts)) if Hash === opts
@scope.where_clause += where_clause.invert
@scope
end