How do I query multiple images with gatsby-image?

问题

I have 16 images that I want to render out onto a website in a grid format.

I'm using the following plugins for this:

gatsby-image
gatsby-source-filesystem
gatsby-plugin-sharp
gatsby-transformer-sharp

I read the documentation and as for as I know, it only demonstrated how to query for one single image.

e.g.

import React from "react"
import { graphql } from "gatsby"
import Img from "gatsby-image"

export default ({ data }) => (
  <div>
    <h1>Hello gatsby-image</h1>
    <Img fixed={data.file.childImageSharp.fixed} />
  </div>
)

export const query = graphql`
  query {
    file(relativePath: { eq: "blog/avatars/kyle-mathews.jpeg" }) {
      childImageSharp {
        # Specify the image processing specifications right in the query.
        # Makes it trivial to update as your page's design changes.
        fixed(width: 125, height: 125) {
          ...GatsbyImageSharpFixed
        }
      }
    }
  }
`

But how would I go about this if I had 16 images? Writing 16 separate queries seem rather cumbersome and would be difficult to read in the future.

I saw this code in the docs referencing multiple images, but I have trouble trying to access the images themselves.

e.g.

export const squareImage = graphql`
  fragment squareImage on File {
    childImageSharp {
      fluid(maxWidth: 200, maxHeight: 200) {
        ...GatsbyImageSharpFluid
      }
    }
  }
`

export const query = graphql`
  query {
    image1: file(relativePath: { eq: "images/image1.jpg" }) {
      ...squareImage
    }

    image2: file(relativePath: { eq: "images/image2.jpg" }) {
      ...squareImage
    }

    image3: file(relativePath: { eq: "images/image3.jpg" }) {
      ...squareImage
    }
  }
`

My folder structure is as follows:

---package.json

---src

------images

---------the 16 images

------pages

---------the page where I want to render the 16 images in

etc.

Thank you.

回答1:

Having a poke around in GraphiQL should help you, especially the Explorer. Although remember that Gatsby fragments won't work in GraphiQL.

{
  allImageSharp {
    edges {
      node {
        id
        fluid(maxWidth: 200, maxHeight: 200) {
            ...GatsbyImageSharpFluid
        }
      }
    }
  }
}

So the above should be equal to something like the following query which will work in GraphiQL

{
  allImageSharp {
    edges {
      node {
        id
        fluid(maxHeight: 200, maxWidth: 200) {
          src
          srcSet
          base64
          aspectRatio
          originalImg
          sizes        
        }
      }
    }
  }
}

Then your component can use this same query and render the results like this:

import React from "react"
import { graphql } from "gatsby"
import Img from "gatsby-image"

const imgGridStyle = {
  display: 'grid',
  gridTemplateColumns: `repeat(auto-fill, 200px)`
};

export default ({ data }) => (
  <div>
    <h1>Hello gatsby-image</h1>
    <div style={imgGridStyle}>
      {data.allImageSharp.edges.map(edge => 
        <Img fluid={edge.node.fluid} />
      )}
    </div>
  </div>
)

export const query = graphql`
  query {
    allImageSharp {
      edges {
        node {
          id
          fluid(maxWidth: 200, maxHeight: 200) {
            ...GatsbyImageSharpFluid
          }
        }
      }
    }
  }
`

You can easily loop over the resulting array of imageSharp nodes returned from the query in data.allImageSharp.edges.map. Then pass each node's fluid property, as the fluid prop to gatsby-image.

Note: This renders every imageSharp node in your project, which may or may not be what you want to achieve.

来源：https://stackoverflow.com/questions/56437205/how-do-i-query-multiple-images-with-gatsby-image

标签

reactjs

gatsby