method
not
v7.1.3.2 -
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Class: WhereChain
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- What's this?
not(opts, *rest)
public
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 NOT (name = 'Jon' AND role = 'admin')
If there is a non-nil condition on a nullable column in the hash condition, the records that have nil values on the nullable column won’t be returned.
User.create!(nullable_country: nil) User.where.not(nullable_country: "UK") # SELECT * FROM users WHERE NOT (nullable_country = 'UK') # => []