Handle constraint error
Select the correct way to handle a constraint validation error.
go
result, err := driver.ExecuteQuery(ctx, query, params, neo4j.EagerResultTransformer)
if err != nil {
if neo4j./*select:IsNeo4jError(err)*/ {
neo4jErr := err.(*neo4j.Neo4jError)
if neo4jErr.Code == "Neo.ClientError.Schema.ConstraintValidationFailed" {
log.Printf("Constraint violation: %s", neo4jErr.Msg)
}
}
}-
❏ IsError
-
✓ IsNeo4jError
-
❏ IsConstraintError
-
❏ IsValidationError
Hint
Use the function that checks if an error is a Neo4j-specific error.
Solution
The correct answer is IsNeo4jError.
go
if neo4j.IsNeo4jError(err) {
neo4jErr := err.(*neo4j.Neo4jError)
if neo4jErr.Code == "Neo.ClientError.Schema.ConstraintValidationFailed" {
log.Printf("Constraint violation: %s", neo4jErr.Msg)
}
}IsNeo4jError() checks if an error is a Neo4j-specific error, allowing you to access the error code and message for proper handling.
Lesson Summary
In this lesson, you learned how to handle errors in Neo4j applications using the Go driver.
You have now completed the course on using Neo4j with Go. You should have a solid understanding of how to integrate Neo4j into your Go applications.