I'm new to JavaScript and Gatsby. I'm trying to use data from Airtable in my project, but I keep getting errors like "Cannot read properties of undefined (reading 'map')". Here's my code:
```jsx
import React from "react"
import { graphql } from "gatsby"
const HomePage = ({data}) => {
const tableEntries = data.allTable.edges;
console.log(tableEntries);
return (
<div>
<h1>Welcome to My Site</h1>
{
tableEntries.map(({node}) => (
<div>
<img src={node.data.EntryType} alt="entry image" />
<a href={`/${node.recordId}`}>View Details</a>
</div>
))
}
</div>
);
}
export const tableQuery = graphql`
query TableDataQuery {
allTable {
edges {
node {
recordId
data {
EntryType
}
}
}
}
}
`
export default HomePage
Can someone help me figure out what I’m doing wrong? Thanks!
I encountered a similar issue when I first started with Gatsby and Airtable. The problem likely stems from the data not being available when your component initially renders. To resolve this, you should implement proper error handling and conditional rendering.
Try wrapping your map function in a conditional check:
{data && data.allTable && data.allTable.edges ? (
data.allTable.edges.map(({node}) => (
// Your existing code here
))
) : (
<p>Loading data...</p>
)}
This approach ensures you’re not trying to map over undefined data. Also, make sure your Airtable plugin is correctly set up in your gatsby-config.js file. Double-check your API key and base ID.
If the issue persists, try logging the entire ‘data’ object to see what’s actually being returned from your GraphQL query. This can help pinpoint where the data structure might differ from what you’re expecting.
yo man, i had similar probs. try this:
check if data exists before mapping:
{data?.allTable?.edges?.length ? (
data.allTable.edges.map(({node}) => (
// ur stuff here
))
) : (
<p>no data yet bro</p>
)}
also make sure ur gatsby-config.js is set right for airtable. good luck!
I’ve been in your shoes, struggling with Airtable and Gatsby integration. The error you’re seeing typically occurs when the data isn’t available when the component renders. Here’s what worked for me:
First, make sure your Airtable plugin is correctly configured in gatsby-config.js. Double-check your API key and base ID.
Then, add a null check before mapping over tableEntries:
{tableEntries && tableEntries.length > 0 ? (
tableEntries.map(({node}) => (
// Your existing code here
))
) : (
<p>No entries found</p>
)}
This approach prevents the error and gives you a fallback UI when data is loading or empty.
Also, consider using the useStaticQuery hook for cleaner code organization. It simplified my data fetching process significantly.
Lastly, don’t forget to restart your development server after making changes to your GraphQL queries. This step is crucial and often overlooked.