Finishes OneToMany Decorator for Moongose

package.json

@@ -53,10 +53,12 @@
     "mongoose": "^5.11.19",
     "passport": "^0.4.1",
     "passport-jwt": "^4.0.0",
+    "pluralize": "^8.0.0",
     "reflect-metadata": "^0.1.13",
     "rimraf": "^3.0.2",
     "rrule": "^2.6.8",
     "rxjs": "^6.6.6",
+    "titleize": "^2.1.0",
     "type-fest": "^0.21.3"
   },
   "devDependencies": {

src/entities/calendar/calendar.model.ts

@@ -12,7 +12,6 @@ import { CalendarEvent } from '../calendarEvent/calendarEvent.model'
   timestamps: true,
   // autoIndex: true
 })
-@Utils.ValidateSchema()
 export class Calendar extends Utils.Model {
   @GQL.Field(() => GQL.ID)
   _id: mongoose.Types.ObjectId

src/entities/calendarEvent/calendarEvent.model.ts

@@ -11,7 +11,6 @@ import { Calendar } from '../calendar/calendar.model'
   timestamps: true,
   // autoIndex: true
 })
-@Utils.ValidateSchema()
 export class CalendarEvent extends Utils.Model {
   @GQL.Field(() => GQL.ID)
   _id: mongoose.Types.ObjectId

src/entities/event/event.model.ts

@@ -11,7 +11,6 @@ import { CalendarEvent } from '../calendarEvent/calendarEvent.model'
 @DB.Schema({
   autoIndex: true,
 })
-@Utils.ValidateSchema()
 export class Event extends Utils.Model {
   @GQL.Field(() => GQL.ID)
   _id: mongoose.Types.ObjectId

src/entities/school/school.model.ts

@@ -12,7 +12,6 @@ import { Subject } from '../subject/subject.model'
   timestamps: true,
   // autoIndex: true
 })
-@Utils.ValidateSchema()
 export class School extends Utils.Model {
   @GQL.Field(() => GQL.ID)
   _id: mongoose.Types.ObjectId
@@ -21,20 +20,10 @@ export class School extends Utils.Model {
   @DB.Prop()
   name: string
 
-  //@DB.Prop({ type: [mongoose.Schema.Types.ObjectId], ref: 'Subject' })
-  @GQL.Field(() => [Subject])
+  @GQL.Field(() => [Subject], { nullable: true })
   @Utils.OneToMany()
   subjects: mongoose.Types.ObjectId[] | Subject[]
 }
 
 export type SchoolDocument = School & mongoose.Document
 export const SchoolSchema = School.schema
-// SchoolSchema.virtual('subjects', {
-//   ref: 'Subject',
-//   localField: '_id',
-//   foreignField: 'school'
-// })
-
-// SchoolSchema.set('toObject', { virtuals: true })
-// SchoolSchema.set('toJSON', { virtuals: true })
-

src/entities/school/school.resolver.ts

@@ -23,7 +23,7 @@ import { Subject } from '../subject/subject.model'
 
 @Resolver(() => School)
 export class SchoolResolver {
-  constructor(private service: SchoolService) { }
+  constructor(private service: SchoolService) {}
 
   @Query(() => School)
   async school(@Args('_id', { type: () => ID }) _id: Types.ObjectId) {

src/entities/subject/subject.model.ts

@@ -12,7 +12,6 @@ import { School } from '../school/school.model'
   timestamps: true,
   // autoIndex: true
 })
-@Utils.ValidateSchema()
 export class Subject extends Utils.Model {
   @GQL.Field(() => GQL.ID)
   _id: mongoose.Types.ObjectId

src/entities/user/user.model.ts

@@ -10,15 +10,13 @@ import * as Utils from '../../utils/Model'
   timestamps: true,
   // autoIndex: true
 })
-@Utils.ValidateSchema()
 export class User extends Utils.Model {
   @GQL.Field(() => GQL.ID)
   _id: mongoose.Types.ObjectId
 
   @GQL.Field(() => String, { nullable: true })
   @DB.Prop({ required: false, min: 3, max: 100 })
   fullName: string
-  // @V.Contains('franco')
 
   @GQL.Field(() => String, { nullable: false })
   @DB.Prop({

src/schema.gql

@@ -159,7 +159,7 @@ type Query {
 type School {
   _id: ID!
   name: String!
-  subjects(populate: Boolean!): [Subject!]!
+  subjects(populate: Boolean!): [Subject!]
 }
 
 type Subject {

src/utils/Model.ts

@@ -1,8 +1,9 @@
 import * as DB from '@nestjs/mongoose' // { Prop, Schema, SchemaFactory }
 import * as V from 'class-validator'
-import * as Reflect from 'reflect-metadata'
 import { ApolloError } from 'apollo-server-errors'
 import { plainToClass } from 'class-transformer'
+import pluralize from 'pluralize'
+import titleize from 'titleize'
 
 export class ModelValidationError extends ApolloError {
   public path: any[]
@@ -17,8 +18,6 @@ export class ModelValidationError extends ApolloError {
   ) {
     super(message, 'MODEL_VALIDATION_FAILED', extensions)
     this.path = path
-    // this.name = 'ModelValidationError'
-    // Object.defineProperty(this, 'name', { value: 'ValidationError' })
   }
 }
 
@@ -32,55 +31,35 @@ export function ValidateSchema() {
   }
 }
 
-function WithRelations() {
-  return function <T extends typeof Model>(target: T) {
-    target.__withRelations__ = true
-    return target
-  }
+interface IOneToManyOptions {
+  ref?: string
+  foreignField?: string
+  localField?: string
 }
 
-
-/*export function HasMany(options: {
-  field: string,
-  ref: string,
-  //foreignField: string
-}) {
-  const { field, ref } = options
-  return function <T extends typeof Model>(target: T) {
-    target.schema.virtual(field, {
+export function OneToMany(options: IOneToManyOptions = {}) {
+  const { ref } = options
+  return (target: any, propertyKey: string) => {
+    const model = target.constructor as typeof Model
+    model.__assoc__ = model.__assoc__ || {}
+    model.__assoc__['OneToMany'] = model.__assoc__['OneToMany'] || []
+    model.__assoc__['OneToMany'].push({
+      target,
+      propertyKey,
       ref,
-      localField: '_id',
-      foreignField: target.name.toLowerCase()
+      foreignField,
+      localField,
     })
-    //console.log(target.name.toLowerCase())
-    target.schema.set('toObject', { virtuals: true })
-    target.schema.set('toJSON', { virtuals: true })
-
-    return target
-  }
-}*/
-
-type ObjectType<T> = { new(): T } | Function;
-// string | ((type?: any) => ObjectType<T>)
-export function OneToMany<T>(typeFunctionOrTarget?: string | ((type?: any) => ObjectType<T>)): PropertyDecorator {
-  return function (object: Object, propertyName: string) {
-    console.log(arguments)
-    console.log(object)
   }
 }
 
-// function format(formatString: string) {
-//   return Reflect.metadata(formatMetadataKey, formatString);
-// }
-
-
 /**
  * Base Model
  */
-@WithRelations()
+@ValidateSchema()
 export class Model {
   static __validate__: boolean | undefined
-  static __withRelations__: boolean | undefined
+  static __assoc__: Record<string, any> | undefined
   static schema?: ReturnType<typeof DB.SchemaFactory.createForClass>
 }
 
@@ -96,18 +75,36 @@ Object.defineProperty(Model, 'schema', {
     // eslint-disable-next-line
     const klass = this
 
-    if (this['__withRelations__']) {
-      schema.pre('findOneAndDelete', async function (next) {
-        console.log('findOneAndDelete:', this)
-        next(undefined)
-      })
+    const assocs = this?.__assoc__?.['OneToMany']
+    if (assocs) {
+      for (const assoc of assocs) {
+        // TODO Cleanup to a function
+        const {
+          target,
+          propertyKey,
+          foreignField: _foreignField,
+          ref: _ref,
+          localField: _localField,
+        } = assoc
+        const model = target.constructor as typeof Model
+        const foreignField = _foreignField ?? model.name.toLowerCase()
+        const localField = _localField ?? '_id'
+        const ref = _ref ?? titleize(pluralize.singular(`${propertyKey}`))
+        model?.schema.virtual(propertyKey, {
+          ref,
+          localField,
+          foreignField,
+        })
+        model?.schema.set('toObject', { virtuals: true })
+        model?.schema.set('toJSON', { virtuals: true })
+      }
     }
 
     if (this['__validate__']) {
+      // TODO Cleanup to a function
       schema.pre('validate', async function (next) {
         const modelData = this.toObject()
         const model = plainToClass(klass, modelData)
-
         try {
           console.log('model', model)
           await V.validateOrReject(model)

yarn.lock

@@ -7167,7 +7167,7 @@ pkg-dir@^5.0.0:
   dependencies:
     find-up "^5.0.0"
 
-[email protected]:
+[email protected], pluralize@^8.0.0:
   version "8.0.0"
   resolved "https://registry.yarnpkg.com/pluralize/-/pluralize-8.0.0.tgz#1a6fa16a38d12a1901e0320fa017051c539ce3b1"
   integrity sha512-Nc3IT5yHzflTfbjgqWcCPpo7DaKy4FnpB0l/zCAW0Tc7jxAiuqSxHasntB3D7887LSrA93kDJ9IXovxJYxyLCA==
@@ -8410,6 +8410,11 @@ through@^2.3.6:
   resolved "https://registry.yarnpkg.com/through/-/through-2.3.8.tgz#0dd4c9ffaabc357960b1b724115d7e0e86a2e1f5"
   integrity sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU=
 
+titleize@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/titleize/-/titleize-2.1.0.tgz#5530de07c22147a0488887172b5bd94f5b30a48f"
+  integrity sha512-m+apkYlfiQTKLW+sI4vqUkwMEzfgEUEYSqljx1voUE3Wz/z1ZsxyzSxvH2X8uKVrOp7QkByWt0rA6+gvhCKy6g==
+
 tmp@^0.0.33:
   version "0.0.33"
   resolved "https://registry.yarnpkg.com/tmp/-/tmp-0.0.33.tgz#6d34335889768d21b2bcda0aa277ced3b1bfadf9"