javascript - Generate options by mapping over array of objects with react-select - Stack Overflow

I'm using react-select to create a Select option in my create-react-app and am trying to map over an array of objects to generate the options. My app loads fine but when I click on the Select I get this error: Uncaught Invariant Violation: Objects are not valid as a React child (found: object with keys {name}). If you meant to render a collection of children, use an array instead.

I'm passing the data to the ponent via props which is working fine, and the data is structured like this:

const guests = [
    {
        name: 'Kait',
        plus: true,
        plusName: 'Kitty'
    },
    {
        name: 'Séanin',
        plus: true,
        plusName: 'Guest'
    }
]

And here's the Select ponent:

<Select
   value={selectedOption}
   onChange={this.handleChange}
   options={
      this.props.guests.map((guest, index) => {
         return {
            label: guest,
            value: guest,
            key: index
         }
      })
   }
/>

Any ideas on how I can fix this?

I'm using react-select to create a Select option in my create-react-app and am trying to map over an array of objects to generate the options. My app loads fine but when I click on the Select I get this error: Uncaught Invariant Violation: Objects are not valid as a React child (found: object with keys {name}). If you meant to render a collection of children, use an array instead.

I'm passing the data to the ponent via props which is working fine, and the data is structured like this:

const guests = [
    {
        name: 'Kait',
        plus: true,
        plusName: 'Kitty'
    },
    {
        name: 'Séanin',
        plus: true,
        plusName: 'Guest'
    }
]

And here's the Select ponent:

<Select
   value={selectedOption}
   onChange={this.handleChange}
   options={
      this.props.guests.map((guest, index) => {
         return {
            label: guest,
            value: guest,
            key: index
         }
      })
   }
/>

Any ideas on how I can fix this?

• javascript
• reactjs
• create-react-app
• react-select

Share Improve this question Follow asked Mar 14, 2019 at 23:16 kaitkait 34522 gold badges33 silver badges1313 bronze badges 1

• I guess the code looks fine. Are you sure you're not displaying guests array anywhere? – Chris Dąbrowski Commented Mar 14, 2019 at 23:41

Add a ment  | 

3 Answers 3

Sorted by: Reset to default 6

Sung M. Kim‘s answer is correct, but there is an easier way to use your attributes as label and value without remapping your options array.

Using the props getOptionLabel and getOptionValue you can keep your object mappings. Both accept a function that gets a single option as an argument and returns the value or label from the appropriate object property as string.

<Select
    options={this.props.guests}
    getOptionLabel={(option) => option.name}
    { /* Couldn't find a value in your structure, so I used name again */ }
    getOptionValue=((option) => option.name}
    { ... }
/>

See documentation for more.

You probably will have to generate the array before rendering the ponent

const options = this.props.guests.map((guest, index) => {
     return {
        label: guest.name,
        value: guest,
        key: index
     }
})
<Select
   value={selectedOption}
   onChange={this.handleChange}
   options={options}
/>

Edit:

is because you are passing an object in the label field. You should pass a String instead

The error occurs because the label is set as guest (an object) not as guest.name (a string).

Making following change will work.

<Select
   value={selectedOption}
   onChange={this.handleChange}
   options={
      this.props.guests.map((guest, index) => {
         return {
-            label: guest,
+            label: guest.name
            value: guest,
            key: index
         }
      })
   }
/>

You can try it out in the sandbox link below.