将嵌套对象写入 Apollo 客户端缓存

Question

我正在尝试将嵌套对象写入 apollo 缓存，但它不起作用。简单的变量写入工作正常。我正在使用 Apollo-client v2.4

// Schema
const GET_DATA_FROM_CACHE = gql `
  name
  address
  age
`
// Reading data from cache
  render() {
    return (
    <Query query = {GET_DATA_FROM_CACHE} fetchPolicy = {"cache-only"}>
      {({ data }) => (
        <View >
          <Text> Name: {data.name} </Text>
        </View>
      )}
    </Query>
   )
  }

// THIS WORKS as I can see the name in my Text field

client.writeData({
  data: {
    name: 'mr x',
    age: 25
  }
})

// THROWS ERROR: "cannot read property country of undefined"

client.writeData({
  data: {
    name: 'mr x',
    address: {
      country: 'y',
      city: 'z'
    },
    age: 25
  }
})

Answer 1

我运行解决了这个问题，并通过确保在嵌套对象中包含一个具有适当值的 __typename 字段来解决它。例如：

client.writeData({
  data: {
    name: 'mr x',
    address: {
      id: 1,
      country: 'y',
      city: 'z',
      __typename: "Address"
    },
    age: 25
  }
})

我还要补充一点，包含一个 'id' 字段是个好主意（除非您配置了 getIdFromObject 选项）。在 Apollo 的 Cache Normalization section.

中有更多信息

作为参考，我得到的错误是：

Invariant Violation: Store error: the application attempted to write an object with no provided id but the store already contains an id of {Typename}:{id} for this object.

将嵌套对象写入 Apollo 客户端缓存

Writing nested object to Apollo client cache

javascript

apollo

graphql

apollo-client