How to dynamically set variables in mutation with react-adopt? - reactjs

Question

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:
This is my mutation, it takes one argument - planID.
const CREATE_ORDER_MUTATION = gql`
mutation CREATE_ORDER_MUTATION($planID: String!) {
createOrder(planID: $planID) {
planID
name
description
subscriptionType
images
subscriptionType
pricePerMonth
}
}
This is the adopt function, it takes a couple of mutations, one of which is createOrder. The way Apollo works is that I need to pass variables prop to createOrder component here. The problem is, I don't have the planID at this point. planID is available only inside of the actual component.
const Composed = adopt({
toggleCart: <Mutation mutation={TOGGLE_CART_MUTATION} />,
createOrder: <Mutation mutation={CREATE_ORDER_MUTATION} />,
});
My component looks like this. I have the planID available here, but how can I pass it as an argument to mutation?!
render() {
const { plan } = this.props;
return (
<Composed>
{({ toggleCart, createOrder }) => {
const handleAdd = () => {
toggleCart();
Router.push('/waschingmachine');
createOrder();
};
return (
<StyledPlan>
<h1>{plan.name}</h1>
<p>{plan.description}</p>
<img src={`static${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>
);
}
If there is no way to solve it this way, how would you approach it differently?

Answer 1

Here is how you can pass arguments through react-adopt way into your inner mutations mapper:
// In a nutshell, `react-adopt` allows you to pass props to your `Composed`
// component, so your inner `mapper` can access those props to pass them to
// your <Query> or <Mutation>
// Here's your initial `Composed` component from above
const Composed = adopt({
// `planId` is passed from below via props (see `<ContainerComponent />)
toggleCart: ({ planId, render }) => (
<Mutation mutation={TOGGLE_CART_MUTATION} variables={{ planId }}>{render}</Mutation>,
),
// `planId` is passed from below via props (see `<ContainerComponent />)
createOrder: ({ planId, render })=> (
<Mutation mutation={CREATE_ORDER_MUTATION} variables={{ planId }}>{render}</Mutation>
)
});
// `<ContainerComponent />` will take a plan as its props and passed `planId` to
// the `<Composed />` component
const ContainerComponent = ({ plan }) => (
<Composed planId={plan.id}>
{({ toggleCart, createOrder }) => {
const handleAdd = e => {
e.preventDefault();
toggleCart();
// ...
createOrder();
// ...
};
// Whatever your UI needs you can pass them here via here
return <YourPresentationComponent onClick={handleAdd} />;
}}
</Composed>
)
// Now all you need to do is to pass `plan` from your render() to the
// <ContainerComponent /> (This is the render() where you return your
render() {
const { plan } = this.props;
return <ContainerComponent plan={plan} />
}
Hopefully this can be helpful to solve your issue! Just a side note, you can also get the previous mapper value and pass them onto the next mapper fn as part of the argument, see below:
const Composed = adopt({
// Here you can retrieve the actual `plan` by using `userId` and pass the result
// into your next children mapper fn to consume
plan: ({ userId, render }) => (
<Query query={GET_PLAN_GRQPHQL} variables={{ userId }}>{render}</Query>
),
// `plan` is actually coming from above <Query /> component
toggleCart: ({ plan, render }) => { //... },
createOrder: ({ plan, render }) => { //...}
});

Answer 2

The mutate function passed in the rendered children can be called with options.
Options can include variables used in the GraphQL mutation string. [1].
This means that you can call the createOrder mutation function like so.
createOrder({ variables: { planID: 'some plan id' } });
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:
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>
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 } });
};
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>
Then update the handler
const handleAdd = planID => {
toggleCart();
Router.push('/waschingmachine');
createOrder({ variables: { planID } });
};
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.