CreateHandler handles POST /T creates a new model T, responds with the created model T if successful.

CreateNestedHandler handles POST /P/:parentIDRouteParam/T where: - P is the parent model, T is the child model - parentIDRouteParam is the route param name of the parent model P - field is the field name of the child model T in the parent model P responds with the updated parent model P Request body: - {...} // fields of the child model T Response: - 200 OK: { P: {...} } - 400 Bad Request: { error: "request band failed" } - 422 Unprocessable Entity: { error: "create process failed" }.

DeleteHandler handles DELETE /T/:idParam Deletes the model T with the given id.

DeleteNestedHandler handles DELETE /P/:parentIdParam/T/:childIdParam where: - P is the parent model, T is the child model - parentIdParam is the route param name of the parent model P - childIdParam is the route param name of the child model T in the parent model P - field is the field name of the child model T in the parent model P Request body: none Response: - 200 OK: { deleted: true } - 400 Bad Request: { error: "missing id" } - 422 Unprocessable Entity: { error: "delete process failed" }.

ErrorResponseBody builds the error response body: { error: "error message" }.

GetByIDHandler handles GET /T/:idParam QueryOptions (See GetRequestOptions for more details): preload Response: - 200 OK: { T: {...} } - 400 Bad Request: { error: "request band failed" } - 422 Unprocessable Entity: { error: "get process failed" }.

GetFieldHandler handles GET /T/:idParam/field QueryOptions (See GetRequestOptions for more details): limit, offset, order_by, desc, filter_by, filter_value, preload, total.

GetListHandler handles GET /T It returns a list of models.

ResponseError writes an error response to client in JSON.

ResponseSuccess writes a success response to client in JSON.

SuccessResponseBody builds the success response body: { `model`: { ..

UpdateHandler handles PUT /T/:idParam Updates the model T with the given id.

GetRequestOptions is the query options (?opt=val) for GET requests: limit=10&offset=4& # pagination order_by=id&desc=true& # ordering filter_by=name&filter_value=John& # filtering total=true& # return total count (all available records under the filter, ignoring pagination) preload=Product&preload=Product.Manufacturer # preloading: loads nested models as well It is used in GetListHandler, GetByIDHandler and GetFieldHandler, to bind the query parameters in the GET request url.