fix(db-mongodb): hasMany relationship filtering with equals operator returns no results

[PatrikKozak]

What

Fixes filtering hasMany relationship fields (both polymorphic and non-polymorphic) with the equals and not_equals operators in the MongoDB adapter.

When using the WhereBuilder UI to filter by these fields, queries would return zero results instead of matching documents.

Why

The MongoDB adapter's sanitizeQueryValue function wasn't handling array values properly for equals/not_equals operators on hasMany relationship fields.

The values coming from the UI are string IDs that need to be converted to MongoDB ObjectIds before comparison:

// Before fix - strings don't match ObjectIds
{ relationshipHasMany: { $eq: ['507f1f77bcf86cd799439011', '507f191e810c19729de860ea'] } } 

// After fix - converted to ObjectIds
{ relationshipHasMany: { $eq: [ObjectId('507f1f77bcf86cd799439011'), ObjectId('507f191e810c19729de860ea')] } } 

How

Added handling in sanitizeQueryValue.ts to detect when:

• The operator is equals or not_equals
• The value is an array
• The field has hasMany: true

For these cases, the array values are converted to the proper ID types (ObjectId for MongoDB IDs, or custom ID types like numbers) before the query is built.

Note: This fix is MongoDB-specific. Exact array equality filtering for hasMany relationships is not currently supported in SQL adapters (Drizzle/Postgres).

[github-actions]

📦 esbuild Bundle Analysis for payload

This analysis was generated by esbuild-bundle-analyzer. 🤖
This PR introduced no changes to the esbuild bundle! 🙌

[DanRibbens]

The feedback applies in all tests.

[github-actions]

🚀 This is included in version v3.72.0