Watch a live product demo 👀 See how Sanity powers richer commerce experiences

Custom GROQ Request in the Preview / Prepare Functions

5 replies
Last updated: Jul 25, 2020
Hi, is it possible to make a custom groq request in the preview / prepare functions? Considering the following code:
export default {
    name: 'singleImage',
    title: 'Single image',
    type: 'object',
    fields: [
        {name: 'image', type: 'image'}
    preview: {
        select: {
            image: 'image'
        prepare: ({image}) => {
            // todo: get image original filename
            return {
                title: 'Single image',
                media: image
I'd like to get the original filename of the image field. Accessing it via the select object will only return its
. I would also need to access references field name and more.
Jul 16, 2020, 9:02 PM
user R
you can dot into references to get their values ( )
So something like this should to it

select: {
   'filename': 'image.asset.originalFilename'
Jul 17, 2020, 7:12 AM
Ok that's great. Thanks
Jul 17, 2020, 8:16 AM
Just a quick issue I went through: when requesting
obj, the media won't be loaded. Requesting
seems to modify the content of the media prop, what could be done here?
export default {
    title: 'Image',
    name: 'imageAlt',
    type: 'image',
    preview: {
        select: {
            title: 'asset.originalFilename',
            media: 'asset'
Jul 23, 2020, 12:01 PM
I think you need to use the
function as well. See the example in the link above.
Jul 23, 2020, 5:19 PM
The issue is exactly the same with
. We can also see that the media object returned is different when we request
Jul 25, 2020, 10:25 AM

Sanity– build remarkable experiences at scale

The Sanity Composable Content Cloud is the modern headless CMS that treats content as data to power your digital business. Free to get started, and pay-as-you-go on all plans.

Categorized in

Related answers

Get more help in the community Slack

TopicCategoriesFeaturedRepliesLast Updated
After adding the subtitle and running this code npm run graphql-deploy It does nothingSep 15, 2020
how to limit a reference to just one entry in Studio reference input side versus the default as-many-entries-as-you-fill-in-an-array...Sep 18, 2020
Is it possible to fetch more than one "_type" using GROQ?Nov 2, 2020
I want to add a view with the Structure builder (S.view.component) where I list similar documents based on the title. What...Sep 23, 2020
Is there a structure builder example where the format of each preview for the document list is modified?Feb 3, 2021
I have an array of references to a country schema type but it always just returns NULL values for meJan 30, 2021
Hi, I need help with a query for getting the url of an image asset. Here is what I've been trying, but I only get the _ref...Dec 1, 2020
Sanity UI looks brilliant :smiley: Is something like the current date picker possible at the moment? I’m not sure if anicon...Dec 21, 2020
Hey everyone. I have been coding and may have potentially accidentally deleted something. Does anyone know how to resolve...Dec 26, 2020
Hello everyone and happy new year :raised_hands::skin-tone-2:, I have a problem with outputting Portable Text :disappointed:...Jan 1, 2021

Related contributions

Clean Next.js + Sanity app
- Template

Official(made by Sanity team)

A clean example of Next.js with embedded Sanity ready for recomposition.

Cody Olsen
Go to Clean Next.js + Sanity app

Blog with Built-in Content Editing
- Template

Official(made by Sanity team)

A Sanity-powered blog with built-in content editing and instant previews.

Go to Blog with Built-in Content Editing