GraphQL: Internal Server Error when querying blogContent in a page

[rjvelazco]

Problem Statement

When querying a page that includes a Blog Content Type and attempting to retrieve the blogContent field (Block Editor), GraphQL throws an Internal Server Error instead of returning the expected data.

Steps to Reproduce

1. Create a Regular Page in dotCMS.

2. Add a Blog Content Type as a contentlet within a container on that page.

3. Navigate to DevTools > GraphQL.

4. Run the following GraphQL query:

   query page {
     page(url: "/example") {
       containers {
         identifier
         containerContentlets {
           uuid
           contentlets {
             ... on Blog {
               title
               blogContent {
                 json
               }
             }
           }
         }
       }
     }
   }

5. Observe that the query fails with an Internal Server Error.

Expected Behavior

• The query should successfully return the blog content stored in the blogContent field without errors.
• The response should correctly serialize the Block Editor content as JSON.

Acceptance Criteria

• GraphQL should correctly resolve blogContent when queried within a page.
• Ensure that blogContent properly serializes Block Editor content as JSON.
• No Internal Server Error should occur when querying pages that contain Blog contentlets.
• Add test cases for retrieving blogContent via GraphQL to prevent regressions.

dotCMS Version

Reproducible in: main / trunk / demo

Proposed Objective

Technical User Experience

Proposed Priority

Priority 3 - Average

Quality Assurance Notes & Workarounds

• Temporary Workaround: If applicable, suggest an alternative way to fetch blogContent until the issue is resolved.
• Verify the fix by testing the query on multiple pages containing Blog contentlets.

Sub-Tasks & Estimates

• Investigate the root cause of the error.
• Implement a fix for blogContent serialization in GraphQL.
• Write unit tests to validate proper serialization and prevent future regressions.
• Perform QA testing to confirm the fix works across different page configurations.