My problem is reading properties of nested object, which is inside other nested object.
GraphQL
type Mapping { id: ID! partnerSegmentId: ID! ctSegmentId: CtSegment! } type PartnerSegment { id: ID! name: String! platformId: Int! partner: Partner! } type Partner { id: ID! name: String! } Once I try to query it like:
{ allMappings { partnerSegmentId { id name partner { id } } } } I recieve:
{ "data": { "allMappings": [ null ] }, "errors": [ { "message": "Cannot return null for non-nullable field Partner.name.", "locations": [ { "line": 8, "column": 9 } ], "path": [ "allMappings", 0, "partnerSegmentId", "partner", "name" ] } ] } Mapping schema
const mappingSchema = new mongoose.Schema( { partnerSegmentId: { type: mongoose.Schema.Types.ObjectId, ref: 'PartnerSegment', required: [true, 'Mapping must have partner segment id.'] }, ctSegmentId: { type: mongoose.Schema.Types.ObjectId, ref: 'CtSegment', required: [true, 'Mapping must have CT segment id.'] } }, { timestamps: true } ); I tried to read separately Partner, PartnerSegment and Mapping models. All works fine. Any idea where i should search source of the problem? I've checked mongodb docs and ids looks okay. I suppose it's fault of my model.
If you would like to take a closer look it's project repo.
1 Answers
Answers 1
SOLUTION:
Garbe Id in the return value was caused by not working populate on the nested entity. This solved my problem:
const allMappings = () => Mapping.find({}) .populate('user') .populate('ctSegment') .populate({ path: 'partnerSegment', populate: { path: 'partner' } }) .exec(); 
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