Examples

This page provides real-world schema examples demonstrating DDK capabilities using operational physical world scenarios.

Rail Network Operations
Asset Maintenance
Fleet & Logistics
Complete Schemas from Test Suite

Rail Network Operations

A rail operations schema for managing lines, services, stations, and disruption events.

Schema

rail.orm.graphqls:

graphql

type Line @required(type: "CREATE,READ,UPDATE,DELETE", table: "true") {
  id: ID! @constraint(type: "primarykey")
  code: String! @constraint(type: "unique")
  name: String!
  status: LineStatus! @constraint(type: "default", value: "OPERATIONAL")

  stations: [Station]!
    @mapping(
      type: "many2many"
      foreignKey: "id"
      foreignKeyReference: "id"
      mappingTable: "LineStation"
    )
  services: [Service]!
    @mapping(type: "one2many", foreignKey: "lineId", foreignKeyReference: "id")
}

type Station @required(type: "CREATE,READ,UPDATE,DELETE", table: "true") {
  id: ID! @constraint(type: "primarykey")
  code: String! @constraint(type: "unique")
  name: String!
  zone: Int!
  latitude: Float
  longitude: Float

  lines: [Line]!
    @mapping(
      type: "many2many"
      foreignKey: "id"
      foreignKeyReference: "id"
      mappingTable: "LineStation"
    )
  stops: [ServiceStop]!
    @mapping(
      type: "one2many"
      foreignKey: "stationId"
      foreignKeyReference: "id"
    )
}

type LineStation @required(type: "CREATE,READ,DELETE", table: "true") {
  LineID: String @constraint(type: "primarykey")
  StationID: String @constraint(type: "primarykey")
  stopOrder: Int!
}

type Service @required(type: "CREATE,READ,UPDATE,DELETE", table: "true") {
  id: ID! @constraint(type: "primarykey")
  serviceNumber: String! @constraint(type: "unique")
  lineId: String
  scheduledDeparture: String!
  scheduledArrival: String!
  status: ServiceStatus! @constraint(type: "default", value: "ON_TIME")
  delayMinutes: Int @constraint(type: "default", value: "0")

  line: Line
    @mapping(type: "backRef", foreignKey: "id", foreignKeyReference: "lineId")
  stops: [ServiceStop]!
    @mapping(
      type: "one2many"
      foreignKey: "serviceId"
      foreignKeyReference: "id"
    )
  disruptions: [Disruption]!
    @mapping(
      type: "many2many"
      foreignKey: "id"
      foreignKeyReference: "id"
      mappingTable: "ServiceDisruption"
    )
}

type ServiceStop @required(type: "CREATE,READ,UPDATE,DELETE", table: "true") {
  id: ID! @constraint(type: "primarykey")
  serviceId: String
  stationId: String
  scheduledArrival: String
  scheduledDeparture: String
  actualArrival: String
  actualDeparture: String
  stopOrder: Int!

  service: Service
    @mapping(
      type: "backRef"
      foreignKey: "id"
      foreignKeyReference: "serviceId"
    )
  station: Station
    @mapping(
      type: "backRef"
      foreignKey: "id"
      foreignKeyReference: "stationId"
    )
}

type Disruption @required(type: "CREATE,READ,UPDATE,DELETE", table: "true") {
  id: ID! @constraint(type: "primarykey")
  title: String!
  description: String
  severity: DisruptionSeverity!
  status: DisruptionStatus! @constraint(type: "default", value: "ACTIVE")
  startedAt: String!
  resolvedAt: String

  affectedServices: [Service]!
    @mapping(
      type: "many2many"
      foreignKey: "id"
      foreignKeyReference: "id"
      mappingTable: "ServiceDisruption"
    )
}

type ServiceDisruption @required(type: "CREATE,READ,DELETE", table: "true") {
  ServiceID: String @constraint(type: "primarykey")
  DisruptionID: String @constraint(type: "primarykey")
}

enum LineStatus {
  OPERATIONAL
  SUSPENDED
  PARTIAL
}

enum ServiceStatus {
  ON_TIME
  DELAYED
  CANCELLED
  DIVERTED
}

enum DisruptionSeverity {
  LOW
  MEDIUM
  HIGH
  CRITICAL
}

enum DisruptionStatus {
  ACTIVE
  MONITORING
  RESOLVED
}

Custom Resolvers

rail.custom.graphqls:

graphql

extend type Query {
  getActiveDisruptions: [Disruption]! @resolver(type: "CUSTOM")
  getServicesByLine(lineId: ID!, date: String!): [Service]!
    @resolver(type: "CUSTOM")
  getDelayedServices(thresholdMinutes: Int!): [Service]!
    @resolver(type: "CUSTOM")
  getDisruptionImpact(disruptionId: ID!): DisruptionImpact!
    @resolver(type: "CUSTOM")
}

extend type Mutation {
  createDisruption(
    title: String!
    description: String
    severity: DisruptionSeverity!
    affectedServiceIds: [ID!]!
  ): Disruption! @resolver(type: "CUSTOM")

  resolveDisruption(disruptionId: ID!): Disruption! @resolver(type: "CUSTOM")
  updateServiceDelay(serviceId: ID!, delayMinutes: Int!): Service!
    @resolver(type: "CUSTOM")
}

extend type Subscription {
  onDisruptionUpdate: Disruption! @subscriber(type: "CUSTOM")
  onServiceStatusChange(lineId: ID!): Service! @subscriber(type: "CUSTOM")
}

type DisruptionImpact {
  affectedServicesCount: Int!
  estimatedPassengersAffected: Int!
  averageDelayMinutes: Float!
}

Sample Queries

Get Active Disruptions with Affected Services:

graphql

query {
  getActiveDisruptions {
    id
    title
    severity
    status
    startedAt
    affectedServices {
      serviceNumber
      status
      delayMinutes
      line {
        code
        name
      }
    }
  }
}

Create Disruption:

graphql

mutation {
  createDisruption(
    title: "Signalling fault between Central and Town Hall"
    severity: HIGH
    affectedServiceIds: ["svc-001", "svc-002", "svc-003"]
  ) {
    id
    title
    severity
    affectedServices {
      serviceNumber
    }
  }
}

Asset Maintenance

An operational asset management schema for tracking physical assets, maintenance schedules, and work orders across a site or network.

Schema

maintenance.orm.graphqls:

graphql

type Site @required(type: "CREATE,READ,UPDATE,DELETE", table: "true") {
  id: ID! @constraint(type: "primarykey")
  code: String! @constraint(type: "unique")
  name: String!
  locationType: LocationType!
  latitude: Float
  longitude: Float

  assets: [Asset]!
    @mapping(type: "one2many", foreignKey: "siteId", foreignKeyReference: "id")
}

type AssetType @required(type: "CREATE,READ,UPDATE,DELETE", table: "true") {
  id: ID! @constraint(type: "primarykey")
  name: String! @constraint(type: "unique")
  category: String!
  defaultMaintenanceIntervalDays: Int!
    @constraint(type: "check", value: "defaultMaintenanceIntervalDays > 0")

  assets: [Asset]!
    @mapping(
      type: "one2many"
      foreignKey: "assetTypeId"
      foreignKeyReference: "id"
    )
}

type Asset @required(type: "CREATE,READ,UPDATE,DELETE", table: "true") {
  id: ID! @constraint(type: "primarykey")
  serialNumber: String! @constraint(type: "unique")
  name: String!
  assetTypeId: String
  siteId: String
  status: AssetStatus! @constraint(type: "default", value: "OPERATIONAL")
  commissionedAt: String!
  lastMaintenanceAt: String
  nextMaintenanceDue: String

  assetType: AssetType
    @mapping(
      type: "backRef"
      foreignKey: "id"
      foreignKeyReference: "assetTypeId"
    )
  site: Site
    @mapping(type: "backRef", foreignKey: "id", foreignKeyReference: "siteId")
  workOrders: [WorkOrder]!
    @mapping(type: "one2many", foreignKey: "assetId", foreignKeyReference: "id")
}

type Technician @required(type: "CREATE,READ,UPDATE,DELETE", table: "true") {
  id: ID! @constraint(type: "primarykey")
  employeeId: String! @constraint(type: "unique")
  name: String!
  specialisation: String!
  isAvailable: Boolean @constraint(type: "default", value: "true")

  assignments: [WorkOrderAssignment]!
    @mapping(
      type: "one2many"
      foreignKey: "technicianId"
      foreignKeyReference: "id"
    )
}

type WorkOrder @required(type: "CREATE,READ,UPDATE,DELETE", table: "true") {
  id: ID! @constraint(type: "primarykey")
  workOrderNumber: String! @constraint(type: "unique")
  assetId: String
  type: WorkOrderType!
  priority: WorkOrderPriority! @constraint(type: "default", value: "NORMAL")
  status: WorkOrderStatus! @constraint(type: "default", value: "OPEN")
  description: String!
  scheduledAt: String
  completedAt: String

  asset: Asset
    @mapping(type: "backRef", foreignKey: "id", foreignKeyReference: "assetId")
  assignments: [WorkOrderAssignment]!
    @mapping(
      type: "one2many"
      foreignKey: "workOrderId"
      foreignKeyReference: "id"
    )
}

type WorkOrderAssignment @required(type: "CREATE,READ,DELETE", table: "true") {
  TechnicianID: String @constraint(type: "primarykey")
  WorkOrderID: String @constraint(type: "primarykey")
  assignedAt: String!

  technician: Technician
    @mapping(
      type: "backRef"
      foreignKey: "id"
      foreignKeyReference: "TechnicianID"
    )
  workOrder: WorkOrder
    @mapping(
      type: "backRef"
      foreignKey: "id"
      foreignKeyReference: "WorkOrderID"
    )
}

enum AssetStatus {
  OPERATIONAL
  DEGRADED
  OFFLINE
  DECOMMISSIONED
}

enum WorkOrderType {
  PREVENTIVE
  CORRECTIVE
  INSPECTION
  EMERGENCY
}

enum WorkOrderPriority {
  LOW
  NORMAL
  HIGH
  CRITICAL
}

enum WorkOrderStatus {
  OPEN
  IN_PROGRESS
  ON_HOLD
  COMPLETED
  CANCELLED
}

enum LocationType {
  DEPOT
  STATION
  SUBSTATION
  FIELD_SITE
}

Custom Resolvers

maintenance.custom.graphqls:

graphql

extend type Query {
  getOverdueAssets: [Asset]! @resolver(type: "CUSTOM")
  getOpenWorkOrders(priority: WorkOrderPriority): [WorkOrder]!
    @resolver(type: "CUSTOM")
  getAssetMaintenanceHistory(assetId: ID!): [WorkOrder]!
    @resolver(type: "CUSTOM")
  getAvailableTechnicians(specialisation: String): [Technician]!
    @resolver(type: "CUSTOM")
}

extend type Mutation {
  createWorkOrder(
    assetId: ID!
    type: WorkOrderType!
    priority: WorkOrderPriority!
    description: String!
    scheduledAt: String
  ): WorkOrder! @resolver(type: "CUSTOM")

  assignTechnician(workOrderId: ID!, technicianId: ID!): WorkOrderAssignment!
    @resolver(type: "CUSTOM")
  completeWorkOrder(workOrderId: ID!): WorkOrder! @resolver(type: "CUSTOM")
}

extend type Subscription {
  onCriticalWorkOrderCreated: WorkOrder! @subscriber(type: "CUSTOM")
}

Sample Queries

Get Overdue Assets with Open Work Orders:

graphql

query {
  getOverdueAssets {
    serialNumber
    name
    status
    nextMaintenanceDue
    assetType {
      name
      category
    }
    site {
      name
      locationType
    }
    workOrders {
      workOrderNumber
      type
      priority
      status
    }
  }
}

Create Emergency Work Order:

graphql

mutation {
  createWorkOrder(
    assetId: "asset-rail-pantograph-07"
    type: EMERGENCY
    priority: CRITICAL
    description: "Pantograph contact strip failure reported by driver on service SVC-112"
    scheduledAt: "2025-04-12T08:00:00Z"
  ) {
    id
    workOrderNumber
    priority
    asset {
      serialNumber
      name
    }
  }
}

Fleet & Logistics

A fleet operations schema for managing vehicles, depots, routes, and delivery assignments.

Schema

fleet.orm.graphqls:

graphql

type Depot @required(type: "CREATE,READ,UPDATE,DELETE", table: "true") {
  id: ID! @constraint(type: "primarykey")
  code: String! @constraint(type: "unique")
  name: String!
  address: String!
  latitude: Float!
  longitude: Float!
  capacity: Int! @constraint(type: "check", value: "capacity > 0")

  vehicles: [Vehicle]!
    @mapping(type: "one2many", foreignKey: "depotId", foreignKeyReference: "id")
  drivers: [Driver]!
    @mapping(
      type: "one2many"
      foreignKey: "homeDepotId"
      foreignKeyReference: "id"
    )
}

type Vehicle @required(type: "CREATE,READ,UPDATE,DELETE", table: "true") {
  id: ID! @constraint(type: "primarykey")
  registrationNumber: String! @constraint(type: "unique")
  type: VehicleType!
  capacityKg: Float! @constraint(type: "check", value: "capacityKg > 0")
  status: VehicleStatus! @constraint(type: "default", value: "AVAILABLE")
  depotId: String
  currentLatitude: Float
  currentLongitude: Float

  depot: Depot
    @mapping(type: "backRef", foreignKey: "id", foreignKeyReference: "depotId")
  assignments: [RouteAssignment]!
    @mapping(
      type: "one2many"
      foreignKey: "vehicleId"
      foreignKeyReference: "id"
    )
}

type Driver @required(type: "CREATE,READ,UPDATE,DELETE", table: "true") {
  id: ID! @constraint(type: "primarykey")
  employeeId: String! @constraint(type: "unique")
  name: String!
  licenceClass: String!
  homeDepotId: String
  status: DriverStatus! @constraint(type: "default", value: "AVAILABLE")

  homeDepot: Depot
    @mapping(
      type: "backRef"
      foreignKey: "id"
      foreignKeyReference: "homeDepotId"
    )
  assignments: [RouteAssignment]!
    @mapping(
      type: "one2many"
      foreignKey: "driverId"
      foreignKeyReference: "id"
    )
}

type Route @required(type: "CREATE,READ,UPDATE,DELETE", table: "true") {
  id: ID! @constraint(type: "primarykey")
  routeCode: String! @constraint(type: "unique")
  originDepotId: String
  destinationAddress: String!
  destinationLatitude: Float!
  destinationLongitude: Float!
  estimatedDurationMinutes: Int!
  distanceKm: Float!

  originDepot: Depot
    @mapping(
      type: "backRef"
      foreignKey: "id"
      foreignKeyReference: "originDepotId"
    )
  stops: [RouteStop]!
    @mapping(type: "one2many", foreignKey: "routeId", foreignKeyReference: "id")
  assignments: [RouteAssignment]!
    @mapping(type: "one2many", foreignKey: "routeId", foreignKeyReference: "id")
}

type RouteStop @required(type: "CREATE,READ,UPDATE,DELETE", table: "true") {
  id: ID! @constraint(type: "primarykey")
  routeId: String
  stopOrder: Int!
  address: String!
  latitude: Float!
  longitude: Float!
  serviceWindowStart: String
  serviceWindowEnd: String

  route: Route
    @mapping(type: "backRef", foreignKey: "id", foreignKeyReference: "routeId")
  deliveries: [Delivery]!
    @mapping(
      type: "one2many"
      foreignKey: "routeStopId"
      foreignKeyReference: "id"
    )
}

type RouteAssignment
  @required(type: "CREATE,READ,UPDATE,DELETE", table: "true") {
  id: ID! @constraint(type: "primarykey")
  routeId: String
  vehicleId: String
  driverId: String
  scheduledDate: String!
  status: AssignmentStatus! @constraint(type: "default", value: "SCHEDULED")
  departedAt: String
  completedAt: String

  route: Route
    @mapping(type: "backRef", foreignKey: "id", foreignKeyReference: "routeId")
  vehicle: Vehicle
    @mapping(
      type: "backRef"
      foreignKey: "id"
      foreignKeyReference: "vehicleId"
    )
  driver: Driver
    @mapping(type: "backRef", foreignKey: "id", foreignKeyReference: "driverId")
  deliveries: [Delivery]!
    @mapping(
      type: "one2many"
      foreignKey: "routeAssignmentId"
      foreignKeyReference: "id"
    )
}

type Delivery @required(type: "CREATE,READ,UPDATE,DELETE", table: "true") {
  id: ID! @constraint(type: "primarykey")
  referenceNumber: String! @constraint(type: "unique")
  routeAssignmentId: String
  routeStopId: String
  weightKg: Float! @constraint(type: "check", value: "weightKg > 0")
  status: DeliveryStatus! @constraint(type: "default", value: "PENDING")
  deliveredAt: String
  signedOffBy: String

  routeAssignment: RouteAssignment
    @mapping(
      type: "backRef"
      foreignKey: "id"
      foreignKeyReference: "routeAssignmentId"
    )
  routeStop: RouteStop
    @mapping(
      type: "backRef"
      foreignKey: "id"
      foreignKeyReference: "routeStopId"
    )
}

enum VehicleType {
  LIGHT_RIGID
  HEAVY_RIGID
  ARTICULATED
  REFRIGERATED
}

enum VehicleStatus {
  AVAILABLE
  IN_SERVICE
  MAINTENANCE
  DECOMMISSIONED
}

enum DriverStatus {
  AVAILABLE
  ON_ROUTE
  ON_LEAVE
  OFF_DUTY
}

enum AssignmentStatus {
  SCHEDULED
  DEPARTED
  IN_PROGRESS
  COMPLETED
  CANCELLED
}

enum DeliveryStatus {
  PENDING
  IN_TRANSIT
  DELIVERED
  FAILED
  RETURNED
}

Custom Resolvers

fleet.custom.graphqls:

graphql

extend type Query {
  getActiveRoutes(date: String!): [RouteAssignment]! @resolver(type: "CUSTOM")
  getAvailableVehicles(depotId: ID!, date: String!): [Vehicle]!
    @resolver(type: "CUSTOM")
  getFleetUtilisation(
    depotId: ID!
    startDate: String!
    endDate: String!
  ): FleetUtilisation! @resolver(type: "CUSTOM")
  getPendingDeliveries(depotId: ID!): [Delivery]! @resolver(type: "CUSTOM")
}

extend type Mutation {
  assignRouteResources(
    routeId: ID!
    vehicleId: ID!
    driverId: ID!
    scheduledDate: String!
  ): RouteAssignment! @resolver(type: "CUSTOM")

  recordDelivery(deliveryId: ID!, signedOffBy: String!): Delivery!
    @resolver(type: "CUSTOM")

  reportDeliveryFailure(deliveryId: ID!, reason: String!): Delivery!
    @resolver(type: "CUSTOM")
}

extend type Subscription {
  onRouteStatusUpdate(depotId: ID!): RouteAssignment!
    @subscriber(type: "CUSTOM")
}

type FleetUtilisation {
  totalVehicles: Int!
  activeVehicles: Int!
  utilisationRate: Float!
  totalDeliveries: Int!
  completedDeliveries: Int!
  onTimeRate: Float!
}

Sample Queries

Get Active Routes for a Depot:

graphql

query {
  getActiveRoutes(date: "2025-04-12") {
    id
    status
    scheduledDate
    departedAt
    route {
      routeCode
      distanceKm
      estimatedDurationMinutes
    }
    vehicle {
      registrationNumber
      type
    }
    driver {
      name
      licenceClass
    }
    deliveries {
      referenceNumber
      status
      weightKg
    }
  }
}

Assign Vehicle and Driver to Route:

graphql

mutation {
  assignRouteResources(
    routeId: "route-syd-north-04"
    vehicleId: "veh-hrt-018"
    driverId: "drv-emp-0042"
    scheduledDate: "2025-04-12"
  ) {
    id
    status
    vehicle {
      registrationNumber
    }
    driver {
      name
    }
    route {
      routeCode
      destinationAddress
    }
  }
}

---

## Complete Schemas from Test Suite

The DDK test suite contains 30+ complete schema examples. Here are the most instructive ones, taken directly from the test files:

### Self-Referencing Many-to-Many

From `_schema/13_self_ref-many2many.graphqls` — demonstrates a self-referencing many-to-many relationship where a `Person` can have multiple friends, also of type `Person`:

```graphql
type Person @required(type: "CREATE,READ,UPDATE,DELETE", table: "true") {
  id: ID! @constraint(type: "primarykey")
  name: String!
  friends: [Person]! @mapping(type: "many2many", foreignKey: "id", foreignKeyReference: "id", mappingTable: "PersonFriend")
}

type PersonFriend @required(type: "CREATE,READ,UPDATE,DELETE", table: "true") {
  PersonID: String
  FriendID: String
}

Primitive Arrays

From _schema/25_primitive_array.graphqls — demonstrates using custom scalar types for array columns stored natively in the database:

graphql

type User @required(type: "CREATE,READ,UPDATE,DELETE", table: "true") {
  id: ID! @constraint(type: "primarykey")
  name: String!
  favouriteNumbers: Int1DArray
  ticTacToeBoard: Bool2DArray
}

Available array scalar types include Int1DArray, String1DArray, Float1DArray, Bool1DArray, Int2DArray, String2DArray, Float2DArray, and Bool2DArray.

Check Constraints

From _schema/6_check_constraints.graphqls — demonstrates applying a check constraint to validate field values at the database level:

graphql

type User @required(type: "CREATE,READ,UPDATE,DELETE", table: "true") {
  id: ID! @constraint(type: "primarykey")
  name: String!
  email: String!
  age: Int @constraint(type: "check", value: "age>0")
}

Multiple Constraints

From _schema/20_multiple_constraints.graphqls — demonstrates stacking multiple constraint directives on a single field:

graphql

type User @required(type: "CREATE,READ,UPDATE,DELETE", table: "true") {
  id: ID! @constraint(type: "primarykey")
  name: String! @constraint(type: "notnull") @constraint(type: "unique")
  email: String! @constraint(type: "notnull") @constraint(type: "unique")
  isActive: Boolean @constraint(type: "default", value: "false")
  age: Int @constraint(type: "default", value: "18")
}

Custom Resolvers

From the _19_custom_resolvers/ test directory — demonstrates the ORM schema paired with custom resolver definitions:

19_custom_resolvers.orm.graphqls:

graphql

type User @required(type: "CREATE,READ,UPDATE,DELETE", table: "true") {
  id: ID! @constraint(type: "primarykey")
  name: String!
  email: String!
}

19_custom_resolvers.custom.graphqls:

graphql

extend type Query {
  getUserByEmail(email: String!): User @resolver(type: "CUSTOM")
  getString: String @resolver(type: "CUSTOM")
  getReqString: String! @resolver(type: "CUSTOM")
}

extend type Mutation {
  createUserByEmail(name: String!, email: String!): User
    @resolver(type: "CUSTOM")
  updateUserByEmail(name: String!, email: String!): User
    @resolver(type: "CUSTOM")
}

extend type Subscription {
  subListUsers: [User] @subscriber(type: "CUSTOM")
}

Back References

From _schema/23_back_references.graphqls — demonstrates using backRef mappings to navigate relationships from the child side:

graphql

type User @required(type: "CREATE,READ,UPDATE,DELETE", table: "true") {
  id: ID! @constraint(type: "primarykey")
  name: String!
  contacts: [Contact]!
    @mapping(type: "one2many", foreignKey: "userId", foreignKeyReference: "id")
}

type Contact @required(type: "CREATE,READ,UPDATE,DELETE", table: "true") {
  id: ID! @constraint(type: "primarykey")
  userId: String
  phone: String
  myUser: User!
    @mapping(type: "backRef", foreignKey: "id", foreignKeyReference: "userId")
}

Schema Guide - Detailed directive reference
Custom Resolvers - Implementation guide
Architecture - How the DDK works
Usage - How to use the DDK service
FAQs - Common questions

Creating a Data Schema

Building and Configuring Workflows

DDK (Data)

MDK (Modelling)

Modelling Library

FDK (Frontend)

Nexus (Deployment)

Examples

Table of Contents

Rail Network Operations

Schema

Custom Resolvers

Sample Queries

Asset Maintenance

Schema

Custom Resolvers

Sample Queries

Fleet & Logistics

Schema

Custom Resolvers

Sample Queries

Primitive Arrays

Check Constraints

Multiple Constraints

Custom Resolvers

Back References

Modelling Library

Examples ​

Table of Contents ​

Rail Network Operations ​

Schema ​

Custom Resolvers ​

Sample Queries ​

Asset Maintenance ​

Schema ​

Custom Resolvers ​

Sample Queries ​

Fleet & Logistics ​

Schema ​

Custom Resolvers ​

Sample Queries ​

Primitive Arrays ​

Check Constraints ​

Multiple Constraints ​

Custom Resolvers ​

Back References ​

Related Documentation ​

Examples

Table of Contents

Rail Network Operations

Schema

Custom Resolvers

Sample Queries

Asset Maintenance

Schema

Custom Resolvers

Sample Queries

Fleet & Logistics

Schema

Custom Resolvers

Sample Queries

Primitive Arrays

Check Constraints

Multiple Constraints

Custom Resolvers

Back References

Related Documentation