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Known Error Codes
In order to allow clients to reliably detect individual error causes, LoopBack
sets the error code property to a machine-readable string.
| Error code | Description |
|---|---|
| ENTITY_NOT_FOUND | The entity (model) was not found. This error is returned for example by EntityCrudRepository.prototype.findById |
| VALIDATION_FAILED | The data provided by the client is not a valid entity. |
| INVALID_PARAMETER_VALUE | The value provided for a parameter of a REST endpoint is not valid. For example, a string value was provided for a numeric parameter. |
| MISSING_REQUIRED_PARAMETER | No value was provided for a required parameter. |
Besides LoopBack-specific error codes, your application can encounter low-level
error codes from Node.js and the underlying operating system. For example, when
a connector is not able to reach the database, an error with code ECONNREFUSED
is returned.
See the following resources for a list of low-level error codes: