如何通过react-adopt动态设置变量中的变量? [英] How to dynamically set variables in mutation with react-adopt?

问题描述

在我的组件中，我正在使用react-adopt来组成graphql查询和变异，以便我的渲染道具不会太混乱.我有以下代码:

In my component, I am using react-adopt, to compose graphql queries and mutations, so that my render props don't get too messy. I have the following code:

这是我的变异，它带有一个参数-planID.

This is my mutation, it takes one argument - planID.

const CREATE_ORDER_MUTATION = gql`
  mutation CREATE_ORDER_MUTATION($planID: String!) {
    createOrder(planID: $planID) {
      planID
      name
      description
      subscriptionType
      images
      subscriptionType
      pricePerMonth
}
}

这是take函数，它需要几个突变，其中之一是createOrder.Apollo的工作方式是我需要在此处将变量prop传递给createOrder组件.问题是，我目前没有planID.planID仅在实际组件内部可用.

This is the adopt function, it takes a couple of mutations, one of which is createOrder. The way Apollo works is that I need to pass variables prop to createOrder component here. The problem is, I don't have the planID at this point. planID is available only inside of the actual component.

const Composed = adopt({
  toggleCart: <Mutation mutation={TOGGLE_CART_MUTATION} />,
  createOrder: <Mutation mutation={CREATE_ORDER_MUTATION} />,
});

我的组件看起来像这样.我在这里有planID，但是如何将其作为突变的参数传递呢?

My component looks like this. I have the planID available here, but how can I pass it as an argument to mutation?!

render() {
const { plan } = this.props;
return (
  <Composed>
    {({ toggleCart, createOrder }) => {
      const handleAdd = () => {
        toggleCart();
        Router.push('/waschingmachine');
        createOrder();
      };
      return (
        <StyledPlan>
          <h1>{plan.name}</h1>
          <p>{plan.description}</p>
          <img src={`static${plan.images[0]}`} alt="blue1" />
          <h2>{plan.pricePerMonth / 100} EUR</h2>
          <div className="buttons">
            <Link
              href={{
                pathname: '/plan',
                query: { id: plan.id },
              }}
            >
              <button type="button">info</button>
            </Link>
            <button onClick={handleAdd} type="button">
              Select Plan
            </button>
          </div>
        </StyledPlan>
      );
    }}
  </Composed>
);
}

如果没有办法以这种方式解决它，您将如何以不同的方式来解决?

If there is no way to solve it this way, how would you approach it differently?

推荐答案

可以通过选项调用在呈现的子级中传递的mutate函数.选项可以包括在GraphQL突变字符串中使用的变量. ^[1]

The mutate function passed in the rendered children can be called with options. Options can include variables used in the GraphQL mutation string. ^[1].

这意味着您可以像这样调用 createOrder 变异函数.

This means that you can call the createOrder mutation function like so.

createOrder({ variables: { planID: 'some plan id' } });

鉴于planID的动态性质，有多种实现方法.一种方法是使用如下数据属性:

Given the dynamic nature of planID, there are a number of ways to implement this. One of which is to use data attributes as below:

可以在按钮上为计划ID设置 data 属性.

A data attribute can be set on for the plan id on the button .

<button onClick={handleAdd} data-planid={plan.id} type="button">
      Select Plan
</button>

可以重构

handleAdd 从目标数据集属性获取 planid ，并使用 planID 变量调用 createOrder

handleAdd can be refactored to get the planid from the target dataset attribute and invoke createOrder with planID variable.

const handleAdd = event => {
    const planID = event.target.dataset.planid;
    toggleCart();
    Router.push('/waschingmachine');
    createOrder({ variables: { planID } });
};

另一种方法是在 onClick 属性中调用按钮时将 planID 直接传递给 handleAdd .

Another is to directly pass planID to handleAdd when calling it in the onClick prop for the button.

<button onClick={() => handleAdd(plan.id)} type="button">
      Select Plan
</button>

然后更新处理程序

const handleAdd = planID => {
    toggleCart();
    Router.push('/waschingmachine');
    createOrder({ variables: { planID } });
};

两种方法都需要权衡.对于较早的方法，将planid在DOM中设置为属性，以后可以读取.对于下一个，为N个计划创建了N个处理程序，并将它们保存在内存中.

There are tradeoffs to both approaches. For the earlier approach, the planid are set in the DOM as attributes and can be read later. While for the later one, N handlers are created for N plans and are kept in memory.

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