当外键约束无法添加,因为列类型与引用列类型不匹配时引发。
方法
类公共方法
new( message: nil, sql: nil, binds: nil, table: nil, foreign_key: nil, target_table: nil, primary_key: nil, primary_key_column: nil, query_parser: nil, connection_pool: nil ) 链接
来源: 显示 | 在 GitHub 上
# File activerecord/lib/active_record/errors.rb, line 239 def initialize( message: nil, sql: nil, binds: nil, table: nil, foreign_key: nil, target_table: nil, primary_key: nil, primary_key_column: nil, query_parser: nil, connection_pool: nil ) @original_message = message @query_parser = query_parser if table type = primary_key_column.bigint? ? :bigint : primary_key_column.type msg = <<~EOM.squish Column `#{foreign_key}` on table `#{table}` does not match column `#{primary_key}` on `#{target_table}`, which has type `#{primary_key_column.sql_type}`. To resolve this issue, change the type of the `#{foreign_key}` column on `#{table}` to be :#{type}. (For example `t.#{type} :#{foreign_key}`). EOM else msg = <<~EOM.squish There is a mismatch between the foreign key and primary key column types. Verify that the foreign key column type and the primary key of the associated table match types. EOM end if message msg << "\nOriginal message: #{message}" end super(msg, sql: sql, binds: binds, connection_pool: connection_pool) end
实例公共方法
set_query(sql, binds) 链接
来源: 显示 | 在 GitHub 上
# File activerecord/lib/active_record/errors.rb, line 275 def set_query(sql, binds) if @query_parser && !@sql self.class.new( message: @original_message, sql: sql, binds: binds, connection_pool: @connection_pool, **@query_parser.call(sql) ).tap do |exception| exception.set_backtrace backtrace end else super end end