modify delete comment

src/modules/database/constraints/data.exist.constraint.ts

@@ -6,6 +6,7 @@ import {
     ValidationOptions,
     registerDecorator,
 } from 'class-validator';
+import { isArray, isNil } from 'lodash';
 import { ObjectType, Repository, DataSource } from 'typeorm';
 
 type Condition = {
@@ -18,9 +19,11 @@ type Condition = {
 export class DataExistConstraint implements ValidatorConstraintInterface {
     constructor(private dataSource: DataSource) {}
 
+    errorValues: any[] = [];
+
     async validate(value: any, validationArguments?: ValidationArguments) {
         let repo: Repository<any>;
-        if (!value) {
+        if (isNil(value)) {
             return true;
         }
         let map = 'id';
@@ -30,6 +33,22 @@ export class DataExistConstraint implements ValidatorConstraintInterface {
         } else {
             repo = this.dataSource.getRepository(validationArguments.constraints[0]);
         }
+        if (isArray(value)) {
+            const values = value as any[];
+            const validationResults = await Promise.all(
+                values.map(async (val) => {
+                    if (isNil(val)) {
+                        return false;
+                    }
+                    const item = await repo.findOne({ where: { [map]: val } });
+                    if (isNil(item)) {
+                        this.errorValues.push(val);
+                    }
+                    return !isNil(item);
+                }),
+            );
+            return validationResults.every((isValid) => isValid);
+        }
         const item = await repo.findOne({ where: { [map]: value } });
         return !!item;
     }
@@ -37,6 +56,11 @@ export class DataExistConstraint implements ValidatorConstraintInterface {
         if (!validationArguments.constraints[0]) {
             return 'Model not been specified!';
         }
+        if (this.errorValues.length > 0) {
+            return `All instance of ${
+                validationArguments.constraints[0].name
+            } must been exists in databse!Errors are ${this.errorValues.join(',')}`;
+        }
         return `All instance of ${validationArguments.constraints[0].name} must been exists in databse!`;
     }
 }