marmelab/react-admin · error · Error

getList is not implemented

Error message

getList is not implemented

What it means

testDataProvider's default getList throws so any list-fetching test must supply its own dataset. This error indicates the List data path was exercised without a getList stub.

Source

Thrown at packages/ra-core/src/dataProvider/testDataProvider.ts:23

 *
 * @example
 * const dataProvider = testDataProvider({
 *    getOne: async () => ({ data: { id: 123, title: 'foo' }})
 * })
 */

const defaultTestDataProvider: DataProvider = {
    create: async () => {
        throw new Error('create is not implemented');
    },
    delete: async () => {
        throw new Error('delete not implemented');
    },
    deleteMany: async () => {
        throw new Error('deleteMany is not implemented');
    },
    getList: async () => {
        throw new Error('getList is not implemented');
    },
    getMany: async () => {
        throw new Error('getMany is not implemented');
    },
    getManyReference: async () => {
        throw new Error('getManyReference is not implemented');
    },
    getOne: async () => {
        throw new Error('getOne is not implemented');
    },
    update: async () => {
        throw new Error('update not implemented');
    },
    updateMany: async () => {
        throw new Error('updateMany not implemented');
    },
};
export const testDataProvider = (

View on GitHub (pinned to 051f511bb0)

Solutions

  1. Stub getList: testDataProvider({ getList: async () => ({ data: [...], total: n }) })
  2. Use mockProvider({ posts: [{ id: 1, ... }] }) which seeds list data per resource
  3. Narrow the test with a queryClient that mocks the react-query layer

Example fix

// before
const dataProvider = testDataProvider();
// after
const dataProvider = testDataProvider({
  getList: async () => ({ data: [{ id: 1, title: 'foo' }], total: 1 }),
});
Defensive patterns

Strategy: try-catch

Validate before calling

if (!dataProviderOverrides.getList) throw new Error('test must stub getList');

Try / catch

try { await dataProvider.getList(r, params); } catch (e) { /* 'getList is not implemented' => add fixture */ throw e; }

Prevention

When it happens

Trigger: Rendering a <List> view, calling useListController/useGetList, or any query hitting dataProvider.getList in tests built on testDataProvider() without overrides.

Common situations: Mounting List pages in component tests; hooks tests calling useGetList; forgetting to stub getList after adding a new query to a component.

Related errors

AI-assisted analysis of marmelab/react-admin@051f511bb0 (2026-08-30). Data as JSON: /api/errors/19fc4632d32522fa. Report an issue: GitHub.