当我使用Apollo时，对象的数组转换为对象的对象

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问题描述

在我们的项目中，我们使用Apollo客户端将查询发送到GraphQl.奇怪的是，它将变量转换为对象的对象.

let variables = [{myField: "myVal"}];
graphql.mutate("mutate myFunction($data:[MyInputType]){
    myFunction(myArg: $data){...blabla...}
}", variables);

当我运行突变并检查请求标头时，我看到我的变量转换为对象的对象.

{"0": {"myField": "myVal"}}

此方法是否默认情况下将变量迫使变量为对象?是否可以使用GraphQl?

将对象数组作为参数发送数组

推荐答案

执行查询时，GraphQl期望variables是一个对象，其中键是变量名称，该值是相应的变量值.文档中使用的每个变量(您发送的整个查询)必须在文档操作定义旁边声明.例如，如果您有一个名为firstName的变量，那就是String:

mutation SomeOperationName ($firstName: String) {
  # your mutation here
}

您可以包括任意数量的变量:

mutation SomeOperationName ($firstName: String, $lastName: String, points: Int)

变量也可以是列表:

mutation SomeOperationName ($names: [String], points: Int)

在所有这些情况下，variables的值您传递给mutate仍然需要是一个对象:

{
  names: ['Bob', 'Susan'],
  points: 12,
}

在您的示例中，您只定义了一个变量，data您已经告诉GraphQl是MyInputType的List.您不能将myField作为变量传递，因为您尚未告诉GraphQl存在变量.但是，如果myField是MyInputType上的字段，那么您的variables只需看起来像这样:

{
  data: [
    {
        myField: 'someValue'
    },
    {
        myField: 'someOtherValue'
    },
  ],
}

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问题描述

In our project we use Apollo client to send queries to GraphQL. Strangely it converts the variables into object of objects.

let variables = [{myField: "myVal"}];
graphql.mutate("mutate myFunction($data:[MyInputType]){
    myFunction(myArg: $data){...blabla...}
}", variables);

When I run the mutation and check request headers, I see that my variables are converted into object of objects.

{"0": {"myField": "myVal"}}

Does this method force variables to be object by default? Is it possible to send array of objects as parameter using GraphQL?

推荐答案

When executing a query, GraphQL expects variables to be an object where the key is the variable name and the value is the corresponding variable value. Every variable used within a document (the entire query you send) must be declared next to the operation definition for the document. For example, if you have a variable named firstName that was a String:

mutation SomeOperationName ($firstName: String) {
  # your mutation here
}

You can include any number of variables:

mutation SomeOperationName ($firstName: String, $lastName: String, points: Int)

Variables can also be lists:

mutation SomeOperationName ($names: [String], points: Int)

In all these cases, however, the value for variables you pass to mutate still needs to be an object:

{
  names: ['Bob', 'Susan'],
  points: 12,
}

In your example, you've only defined a single variable, data, that you've told GraphQL is a List of MyInputType. You can't pass in myField as a variable because you have not told GraphQL that variable exists. However, if myField is a field on MyInputType, then your variables just needs to look like this:

{
  data: [
    {
        myField: 'someValue'
    },
    {
        myField: 'someOtherValue'
    },
  ],
}

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