Can't send Data to relation fields

[faizan_sohail]

I have review collection which has 2 relations and couple of fields user relation and product relation
but when adding review other fields are adding but user and products are not being added below is image of my collection and in comments is image of my code

[faizan_sohail]

here is image of my code

kindly tell me what am I doing wrong

[faizan_sohail]

also here is what I am getting in strapi content the user and product is empty