Schema/Resolve for nested objects graphql/mongoose - json

Question

I am using graphql with mongoose and I am trying to access a nested object array in a json of this form:
"Plans": [
{
"id": ...
"name": ...
"frequency": ...
"lastExecuted": ...
"Steps": {
"Step": [
{
"id": ...
"shortDescription": ...
"description": ...
...
},
{...],
}
I created a mongoose model:
const PlanModel = Mongoose.model("Plan", {
name: String,
frequency: GraphQLString,
lastExecuted: String,
Steps: []
})
Intuitively I would insert my Stepmodel in the array, but this is giving me an error.
So I tried populating the array with the resolver:
Plans: {
type: GraphQLList(PlanType),
args: getGraphQLQueryArgs(PlanType),
resolve: (root, args, context, info) => {
return PlanModel
.find()
.populate("Steps")
.populate("Steps.Step")
.exec();
}
},
This is my PlanType:
const PlanType = new GraphQLObjectType({
name: 'Plan',
fields: () => ({
id: {
type: GraphQLID
},
name: {
type: GraphQLString
},
frequency: {
type: GraphQLString
},
lastExecuted: {
type: GraphQLString
},
maintenanceSteps: {
type: GraphQLList(StepType)
},
})
})
My GraphQL query returns an empty array in this case. I know this is a common problem, but I couldn't find any solution for my problem

Answer 1

The solution to my problem was adding another type:
const StepsType = new GraphQLObjectType({
name: 'Steps',
fields: () => ({
Step: {
type: GraphQLList(StepType)
}
})
})
const PlanType = new GraphQLObjectType({
name: 'Plan',
fields: () => ({
_id: {
type: GraphQLID
},
id: {
type: GraphQLString
},
name: {
type: GraphQLString
},
frequency: {
type: GraphQLString
},
lastExecuted: {
type: GraphQLString
},
status: {
type: GraphQLString
},
Steps: {
type: StepsType
},
})
})