method

foreign_key_exists?

v7.1.3.4 - Show latest stable - 0 notes - Class: ActiveRecord::ConnectionAdapters::SchemaStatements

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What's this?

foreign_key_exists?(from_table, to_table = nil, **options) public

Checks to see if a foreign key exists on a table for a given foreign key definition.

# Checks to see if a foreign key exists.
foreign_key_exists?(:accounts, :branches)

# Checks to see if a foreign key on a specified column exists.
foreign_key_exists?(:accounts, column: :owner_id)

# Checks to see if a foreign key with a custom name exists.
foreign_key_exists?(:accounts, name: "special_fk_name")

Show source

# File activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb, line 1204
      def foreign_key_exists?(from_table, to_table = nil, **options)
        foreign_key_for(from_table, to_table: to_table, **options).present?
      end

foreign_key_exists?

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