fix(core): update

test/test.ts

@@ -100,7 +100,7 @@ tap.test('expect to get instance of Car', async () => {
   do {
     const timeStart = Date.now();
     const myCars = await Car.getInstances<Car>({
-      brand: 'Volvo',
+      brand: 'Renault',
     });
     console.log(`took ${Date.now() - timeStart}`);
     counter++;

ts/smartdata.classes.collection.ts

@@ -1,6 +1,7 @@
 import * as plugins from './smartdata.plugins';
 import { SmartdataDb } from './smartdata.classes.db';
 import { SmartDataDbDoc } from './smartdata.classes.doc';
+import { CollectionFactory } from './smartdata.classes.collectionfactory';
 
 export interface IFindOptions {
   limit?: number;
@@ -15,23 +16,26 @@ export interface IDocValidationFunc<T> {
 
 export type TDelayedDbCreation = () => SmartdataDb;
 
+const collectionFactory = new CollectionFactory();
+
 /**
  * This is a decorator that will tell the decorated class what dbTable to use
  * @param dbArg
  */
 export function Collection(dbArg: SmartdataDb | TDelayedDbCreation) {
-  return function (constructor) {
-    if (dbArg instanceof SmartdataDb) {
-      // tslint:disable-next-line: no-string-literal
-      constructor['smartdataCollection'] = new SmartdataCollection(constructor, dbArg);
-    } else {
-      constructor['smartdataDelayedCollection'] = () => {
-        return new SmartdataCollection(constructor, dbArg());
-      };
+  return function classDecorator<T extends { new (...args: any[]): {} }>(constructor: T) {
+    return class extends constructor {
+      public static get collection() {
+        return collectionFactory.getCollection(constructor.name, dbArg);
       }
+      public get collection() {
+        return collectionFactory.getCollection(constructor.name, dbArg);
+      }
+    };
   };
 }
 
+// tslint:disable-next-line: max-classes-per-file
 export class SmartdataCollection<T> {
   /**
    * the collection that is used
@@ -42,13 +46,13 @@ export class SmartdataCollection<T> {
   public smartdataDb: SmartdataDb;
   public uniqueIndexes: string[] = [];
 
-  constructor(collectedClassArg: T & SmartDataDbDoc<T, unknown>, smartDataDbArg: SmartdataDb) {
+  constructor(classNameArg: string, smartDataDbArg: SmartdataDb) {
     // tell the collection where it belongs
-    this.collectionName = collectedClassArg.name;
+    this.collectionName = classNameArg;
     this.smartdataDb = smartDataDbArg;
 
     // tell the db class about it (important since Db uses different systems under the hood)
-    this.smartdataDb.addTable(this);
+    this.smartdataDb.addCollection(this);
   }
 
   /**

ts/smartdata.classes.collectionfactory.ts

@@ -0,0 +1,22 @@
+import * as plugins from './smartdata.plugins';
+import { SmartdataCollection } from './smartdata.classes.collection';
+import { SmartdataDb } from './smartdata.classes.db';
+
+export class CollectionFactory {
+  public collections: {[key: string]: SmartdataCollection<any>} = {};
+
+  public getCollection = (nameArg: string, dbArg: SmartdataDb | (() => SmartdataDb)): SmartdataCollection<any> => {
+    if (!this.collections[nameArg]) {
+      this.collections[nameArg] = (() => {
+        if (dbArg instanceof SmartdataDb) {
+          // tslint:disable-next-line: no-string-literal
+          return new SmartdataCollection(nameArg, dbArg);
+        } else {
+          dbArg = dbArg();
+          return new SmartdataCollection(nameArg, dbArg);
+        }
+      })();
+    }
+    return this.collections[nameArg];
+  }
+}

ts/smartdata.classes.db.ts

@@ -59,7 +59,7 @@ export class SmartdataDb {
 
   // handle table to class distribution
 
-  public addTable(SmartdataCollectionArg: SmartdataCollection<any>) {
+  public addCollection(SmartdataCollectionArg: SmartdataCollection<any>) {
     this.smartdataCollectionMap.add(SmartdataCollectionArg);
   }
 

ts/smartdata.classes.doc.ts

@@ -45,7 +45,8 @@ export class SmartDataDbDoc<T, TImplements> {
   /**
    * the collection object an Doc belongs to
    */
-  public collection: SmartdataCollection<T>;
+  public static collection: SmartdataCollection<any>;
+  public collection: SmartdataCollection<any>;
 
   /**
    * how the Doc in memory was created, may prove useful later.
@@ -75,32 +76,12 @@ export class SmartDataDbDoc<T, TImplements> {
   /**
    * class constructor
    */
-  constructor() {
-    this.name = this.constructor['name'];
-    if (this.constructor['smartdataCollection']) {
-      // tslint:disable-next-line: no-string-literal
-      this.collection = this.constructor['smartdataCollection'];
-      // tslint:disable-next-line: no-string-literal
-    } else if (typeof this.constructor['smartdataDelayedCollection'] === 'function') {
-      // tslint:disable-next-line: no-string-literal
-      this.collection = this.constructor['smartdataDelayedCollection']();
-    } else {
-      console.error('Could not determine collection for DbDoc');
-    }
-  }
+  constructor() {}
 
   public static async getInstances<T>(
     filterArg: plugins.tsclass.typeFest.PartialDeep<T>
   ): Promise<T[]> {
-    const self: any = this; // fool typesystem
-    let referenceMongoDBCollection: SmartdataCollection<T>;
-
-    if (self.smartdataCollection) {
-      referenceMongoDBCollection = self.smartdataCollection;
-    } else if (self.smartdataDelayedCollection) {
-      referenceMongoDBCollection = self.smartdataDelayedCollection();
-    }
-    const foundDocs = await referenceMongoDBCollection.find(filterArg);
+    const foundDocs = await this.collection.find(filterArg);
     const returnArray = [];
     for (const item of foundDocs) {
       const newInstance = new this();
@@ -146,8 +127,7 @@ export class SmartDataDbDoc<T, TImplements> {
    * deletes a document from the database
    */
   public async delete() {
-    const self: any = this;
-    await this.collection.delete(self);
+    await this.collection.delete(this);
   }
 
   /**