PostgresDB 23503: Foreign Key Violation

A foreign key constraint was violated.

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PostgresDB 23503: Foreign Key Violation

?

Identify the Details of the Error:Execute SELECT * FROM pg_last_error(); to get detailed information about the error, including the specific foreign key constraint that was violated.
Check the Foreign Key Constraint:Identify the table and column involved in the foreign key violation. Use the information from step 1, then run:SELECT conname, conrelid::regclass AS table_name, pg_get_constraintdef(oid) FROM pg_constraint WHERE conname = 'your_constraint_name';Replace 'your_constraint_name' with the actual constraint name from the error message.
Verify Data in the Referenced Table:Based on the foreign key constraint details, check if the referenced value exists in the referenced table. For example, if your constraint is on table_a(column_x) referencing table_b(column_y), run:SELECT * FROM table_b WHERE column_y = 'value';Replace 'value' with the value that caused the violation.
Check for Orphaned Records:For the table and column identified, check if there are records that no longer have a corresponding reference in the parent table. For instance:SELECT * FROM table_a WHERE NOT EXISTS (SELECT 1 FROM table_b WHERE table_a.column_x = table_b.column_y);Adjust table_a, table_b, column_x, and column_y according to your specific error details.
Analyze Database Logs:If the above steps do not clarify the issue, check the PostgreSQL logs for any additional information about the error. Use:tail -n 100 /path/to/your/postgresql/log/file.logReplace /path/to/your/postgresql/log/file.log with the actual path to your PostgreSQL log file. This will show the last 100 lines of the log, which might include more context about the error.

Attached error:

PostgresDB 23503: Foreign Key Violation

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