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Backendless Version (3.x / 6.x, Online / Managed / Pro )

I would like to insert a record in a table called: UserContacts

There is a relationship between UserContacts and Users tables. I cannot store the reference data.

Client SDK (REST / Android / Objective-C / Swift / JS )

Application ID


Expected Behavior

I should be able to add a record with relationship id bound to User table (email).
I am getting the following error:
400 - Relation Parent must be provided and must be a string or an object with objectId property.

Actual Behavior

Please provide a description of what actually happens, working from the same starting point.

Be descriptive: “it doesn’t work” does not describe what the behavior actually is – instead, say “the request returns a 400 error with message XXX”. Copy and paste your logs, and include any URLs.

Reproducible Test Case

Please provide a simple code that could be run in a new clean app and reproduce the issue.

If the issue is more complex or requires configuration, please provide a link to a project on Github that reproduces the issue.

Use a block that is called Deep Save and pass in the entire object structure you need to save.


Thank you!

Deepsave works to add email id in Users table. I have one another issue:
I just want to relate userEmail column in UserContacts table to email in Users table.

this is giving me: 400 - Unable to create relation. Child object with id ‘’ is not found in the related table. (1303)

I am passing the following parameters:
“firstName”: “john”,
“lastName”: “doe”,
“phone”: “3453345345”,
“email”: “”,
“userEmail”: “
} exist as a record in Users table under email col.

Hi, @Sanjay_Christian

The problem seems to be with the provided parameters. The following error

400 - Unable to create relation. The child object with id ‘’ is not found in the linked table. (1303)

means that the server expects the objectId as a provided parameter to establish a relationship between two objects. While you pass the userEmail parameter.

Regards, Marina