Apollo无法访问update中的queryVariables:发生突变后 [英] Apollo can't access queryVariables in update: after a mutation

问题描述

我正在尝试使用update:在执行突变后更新查询.问题是商店中的查询应用了几个不同的变量，我想更新查询并使用相同的变量返回它.

I am trying to use update: to update a query after performing a mutation. The problem is that the query in the store has several different variables applied and I would like to update the query and return it with the same variables.

我在文档中发现updateQueries可以选择包含queryVariables，这是执行查询的最后一组变量.

I found in the docs that updateQueries has an option to include queryVariables which are the last set of variables that the query was executed with.

我还没有找到任何描述如何从更新内部检索queryVariables或类似内容的东西.

I have not found anything that describes how to retrieve the queryVariables or something like it from inside of update.

在更新内:我可以使用

lastQuery = Object.keys(store.data.ROOT_QUERY).slice(-1)[0]

，它将返回类似"userRecipes({"first":20,"minTime":0,"maxTime":500,"filterType":"Explore","searchTerm":""})"

我现在这样做的一种怪诞方式是解析该字符串以提取变量，这样我终于可以像这样使用readQuery了:

The hacky way that I am doing this now is to parse that string to pull out the variables so I can finally use readQuery like so:

      const lastQuery = Object.keys(store.data.ROOT_QUERY).slice(-1)[0] 
      const searchPosition = lastQuery.search("searchTerm")
      const searchTerm = lastQuery.slice((searchPosition + 13),-3)

      // also parsing the lastQuery string for filterType, minTime, maxTime

      const data = store.readQuery({ 
        query: QUERY_USER_RECIPES, 
        variables: { 
                filterType: filterType,
                searchTerm: searchTerm,
                minTime: minTime,
                maxTime: maxTime,
        }
      });

这不是最好的方法.有没有一种更简单的方法来访问更新内部的变量?

This can't be the best way to do this. Is there a simpler way to access variables inside of update?

似乎应该有一种方法可以读取存储中的现有查询和变量，而无需使用readQuery传递变量.

It seems like there should be a way to read the existing query and variables that are in the store without passing variables with readQuery.

感谢您看一下这个问题！

Thanks for taking a look at this issue!

版本

apollo-client@1.4.0 react-apollo@1.4.2

apollo-client@1.4.0 react-apollo@1.4.2

推荐答案

对于阿波罗2，但在1.x版本中应该相同

For apollo 2, but should be the same in 1.x

在文档中，您看到可以还将变量传递给readQuery.

In the docs, you see that you can also pass variables to readQuery.

在此示例中，用户可以单击BookEvent组件来预订事件，如果突变成功，它将自动反映在上部组件EventDetail中.

Here is an example where a user can book an event clicking a BookEvent component, if the mutation succeeds, it is reflected automatically in the upper component EventDetail.

在触发突变的组件(BookEvent)中，我将store和eventId传递给在上部组件(EventDetail)中声明的函数，并通过子组件的props:

In the component that tiggers the mutation (BookEvent), I pass store and eventId to a function declared in the upper component (EventDetail) and passed through props of the child component:

const onClick = () => createEventTicketMutation({
  variables: { eventId: event.id },
  update: (store, { data: { createEventTicket } }) => {
    updateStoreAfterBooking(store, event.id)
  },
})

以下是在上部组件中执行缓存更新的功能:

Here is the function that performs the cache update in the upper component:

const updateCacheAfterBooking = (store, eventId) => {
  const data = store.readQuery({
    query: EVENT_DETAIL_QUERY,
    variables: { id: eventId },
  })
  data.eventDetail.bookings += 1
  store.writeQuery({
    query: EVENT_DETAIL_QUERY, 
    variables: { id: eventId },
    data,
  })
}

它像<BookEvent updateStoreAfterBooking={updateCacheAfterBooking} ... />这样通过.

别忘了还将所需的变量传递给writeQuery.

Don't forget to pass also the needed variables to writeQuery.

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