What to do when relation cannot be created because their is violating data in the referenced table
Relation cannot be created because their is violating data in the referenced table
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Relation cannot be created because their is violating data in the referenced table
Last updated
Was this helpful?
Are you trying to join two tables together & you get the error message, "relation cannot be created because their is violating data in the referenced table"?
In this article we are going to take a look:
Why this error message flags up
How you can solve the error message
How to continue to create a relationships between your different tables.
This error occurs when you have two tables that you're trying to join together & both or one of these tables already has data in it. For example, look at the two tables below.
Imagine that the rentals table & the users table in figure 1.1 do not have a relationship. If you wanted to say that each Rental was owned by a users, you might decide to draw a relationship between the user_id field in the Rentals table & the id field in the Users table. As shown below.
This relation is not allowed, & Dittofi will alert you with the following error message.
The reason there is an error is because there is already data in the Rentals table has a user_id that does not have a corresponding id in the users table. This is the property with a user_id of 14.
The example in figure 1.1 is quite basic. In this case you could:
Change the user_id 14 to another value that is in the users table
Delete the record with the user_id 14.
Add a at least 14 users to the Users table.
In cases where you have a lot of data, you can build a small action to update your data from right inside the Dittofi platform. For instance, you could:
Create an action to loop through all records in your table.
Use a has_record event to check if related data existed in another table.
If the data didn't exist, then you will update the record or delete it.
