[5.x]: GraphQL Autocomplete and Explorer not working

[brookepaxman]

What happened?

Description

We recently upgraded from Craft 4 to Craft 5 and we noticed that the GraphQL Autocomplete and Explorer stopped working as if the introspection queries stopped working. This error is in the browser console: "Error: Invalid or incomplete introspection result. Ensure that you are passing "data" property of introspection response and no "errors" was returned alongside: undefined."

This happens with all of our environments - local with DDEV and staging.

Steps to reproduce

1. Login to the Control Panel
2. Navigate to GraphQL > GraphiQL
3. Click Explorer
4. See "No Schema Available"

Expected behavior

The explorer shows the GraphQL schema and pressing CTRL + Space suggests GraphQL symbols.

Actual behavior

No schema or autocomplete available.

Craft CMS version

Craft Pro 5.5.3

PHP version

8.2.26

Operating system and version

Linux 5.15.0-1058-aws

Database type and version

MySQL 8.0.40

Image driver and version

Imagick 3.7.0 (ImageMagick 6.9.10-23)

Installed plugins and versions

• Amazon S3 | 2.2.1
• Amazon SES | 3.1.0
• Blitz | 5.9.6
• FeedMe | 6.5.0
• Freeform | 5.7.3
• Guest Entries | 4.0.1
• ImageOptimize | 5.0.3
• Neo | 5.2.17
• oEmbed | 3.1.1
• Redactor | 4.2.0
• Redactor Custom Styles | 5.0.0
• Retcon | 3.2.1
• Retour | 5.0.3
• Reverse Relations | 3.0.0
• SEOmatic | 5.1.7
• Sprig | 3.5.1

[brandonkelly]

I’m not able to reproduce that.

It may be the result of a plugin, such as a field type that’s not registering its GraphQL type properly. A quick way to test that is to enable safeMode, clear your data caches (php craft clear-caches/data), and then refresh the page.

If introspection starts working again, then disable safeMode and disable your plugins + clear caches one-by-one until you identify which plugin was causing the issue.

If it’s still a problem, please send a database backup and your Composer files into [email protected] and we can look into it further from there.

[LinneaHarts]

I am also seeing this, with Craft 5.5.5

[brandonkelly]

We were able to reproduce with a customer’s database. It ended up being the same issue as #15068. GraphQL schemas can be much larger in Craft 5 as a result of Matrix entrification (Matrix block types are now entry types; sub-fields are now global), which can lead to a significant increase in custom field arguments within entry queries throughout the GraphQL API.

I managed to prune out some unnecessary custom field arguments for Craft 5.6, which in my example site brought the introspection schema down from 74MB to 47MB.

[brandonkelly]

Craft 5.6.0 is out with those changes 🚀