After I specified my field as required , still swagger request is sent without that field

Try changing your annotations as follows. Note that "required" is not a property attribute, it's an object-level attribute that contains the list of required properties.

*           type: object
*           required:
*             - order_info_id
*             - email
*           properties:
*             order_info_id:
*               type: integer
*             email:
*               type: string
*             host:
*               type: string