Apollo Client：从有错误的查询中检索结果

Question

I'm using the GraphQL Apollo Client. And I'm trying to retrieve the results from a query with errors.

GraphQL response

How do I retrieve the data, even when an error is returned in the same response?

This automatically catches the error. Instead, I want it to access the data.

 this.client.query({ query: gql(query), variables: variables }).then(function ({ data }) { return data; }).catch(error => console.log(error));

Couldn't find anything in Apollo docs about this. Any ideas?

Answer 1

if you stumble here in future

In Apollo-client there are various error types as follow: 1. GraphQL Errors, 2. Server Errors, 3. Transaction Errors, 4. UI Errors, 5. Apollo Client Errors. As @ Alexander Schoonderwaldt you can learn about this errors and error policy here

You can handle/catch graphql errors using code below. If the values returns undefined , its no longer a graphql error. You need to investigate. You may have network error that returns Error CONNREFUSED or others.

.query({
      query: myquery
    })
    .then(({ data }) => {
      console.log(data.user);
      return { loggedInUser: data };
    })
    .catch(errors => {
      // Fail gracefully
      console.log(errors.message); // log grapgql error
      return { loggedInUser: {} };
    });