JsonErr use as handler.JsonErr(c, 0) return.

JsonErrDef use as handler.JsonErrDef(c, errdef.ErrParams) return or use add messages, sep of message use string "; " handler.JsonErrDef(c, errdef.ErrParams, "id", "not found, set id and retry") return.

JsonErrDefErr use as handler.JsonErrDefErr(c, errdef.ErrDatabase, err) return or use add messages, sep of message use string "; " handler.JsonErrDefErr(c, errdef.ErrDatabase, err, "can not found") return.

JsonFail use as handler.JsonFail(c, "fail message") return.

JsonSuccess use as handler.JsonSuccess(c) return.

ParseQueryCommonOffsetAndLimit parse query offset and limit default offset is 0 default limit is 10.