HTTP 201 Created vs 422 Unprocessable Content
HTTP 201 (Created) is a 2xx Success response, while 422 (Unprocessable Content) is a 4xx Client Error response. 201 indicates that the request succeeded and a new resource was created. Typically returned after POST or PUT requests that create a new entity. In contrast, 422 means that the server understands the content type and syntax, but was unable to process the contained instructions. Common in API validation errors.
Descrição
The request succeeded and a new resource was created. Typically returned after POST or PUT requests that create a new entity.
Quando você o vê
After successfully creating a new user, post, order, or other resource via a REST API.
Como corrigir
No fix needed. Check the Location header for the URL of the new resource.
Descrição
The server understands the content type and syntax, but was unable to process the contained instructions. Common in API validation errors.
Quando você o vê
When form validation fails — correct syntax but invalid data (e.g., email format wrong, date in the past).
Como corrigir
Check the response body for specific validation errors and correct the input data.
Diferenças principais
201 is a 2xx Success response, while 422 is a 4xx Client Error response.
HTTP 201: The request succeeded and a new resource was created. Typically returned after POST or PUT requests that create a new entity.
HTTP 422: The server understands the content type and syntax, but was unable to process the contained instructions. Common in API validation errors.
You encounter 201 when after successfully creating a new user, post, order, or other resource via a REST API.
You encounter 422 when when form validation fails — correct syntax but invalid data (e.g., email format wrong, date in the past).
Quando usar qual
For 201 (Created): No fix needed. Check the Location header for the URL of the new resource. For 422 (Unprocessable Content): Check the response body for specific validation errors and correct the input data.