refactor: hasBatchNumber validation

backend/database/bespoke.ts

@@ -132,23 +132,6 @@ export class BespokeQueries {
     `);
   }
 
-  static async itemHasTransactions(
-    db: DatabaseCore,
-    item: string
-  ): Promise<boolean> {
-  /*
-    * to check if an item of given name is present in the SLE
-  */
-    const query = db.knex!(ModelNameEnum.StockLedgerEntry)
-      .select('item')
-      .where('item', item);
-
-    const value = (await query) as Record<string, string | null>[];
-
-    if (!value || value.length == 0) return false;
-    return true;
-  }
-
   static async getStockQuantity(
     db: DatabaseCore,
     item: string,
@@ -184,4 +167,4 @@ export class BespokeQueries {
 
     return value[0][Object.keys(value[0])[0]];
   }
-}
+}

fyo/core/dbHandler.ts

@@ -10,7 +10,7 @@ import {
   DatabaseBase,
   DatabaseDemuxBase,
   GetAllOptions,
-  QueryFilter
+  QueryFilter,
 } from 'utils/db/types';
 import { schemaTranslateables } from 'utils/translationHelpers';
 import { LanguageMap } from 'utils/types';
@@ -19,7 +19,7 @@ import {
   DatabaseDemuxConstructor,
   DocValue,
   DocValueMap,
-  RawValueMap
+  RawValueMap,
 } from './types';
 
 // Return types of Bespoke Queries
@@ -325,12 +325,6 @@ export class DatabaseHandler extends DatabaseBase {
     )) as number | null;
   }
 
-  async itemHasTransactions(item: string): Promise<boolean | null> {
-    return (await this.#demux.callBespoke('itemHasTransactions', item)) as
-      | boolean
-      | null;
-  }
-
   /**
    * Internal methods
    */

models/baseModels/Item/Item.ts

@@ -11,6 +11,7 @@ import {
   ValidationMap,
 } from 'fyo/model/types';
 import { ValidationError } from 'fyo/utils/errors';
+import { ModelNameEnum } from 'models/types';
 import { Money } from 'pesa';
 import { AccountRootTypeEnum, AccountTypeEnum } from '../Account/types';
 
@@ -20,33 +21,6 @@ export class Item extends Doc {
   for?: 'Purchases' | 'Sales' | 'Both';
   hasBatchNumber?: boolean;
 
-  async beforeSync() {
-    /*
-      * This code block is to prevent users from changing the value of Has Batch No Checkbox
-        of the items which already did transactions
-      * allowing users to change the value of Has Batch No of the items which already did
-        transactions will result in incorect SLEs 
-    */
-    const ifItemHasBatchNumber = await this.fyo.db.get(
-      'Item',
-      this.name!,
-      'hasBatchNumber'
-    );
-
-    if (this.hasBatchNumber == ifItemHasBatchNumber.hasBatchNumber) {
-      return;
-    }
-
-    const isItemExistsInSLE = await this.fyo.db.itemHasTransactions(this.name!);
-
-    if (isItemExistsInSLE) {
-      throw new ValidationError(
-        this.fyo.t`Cannot change value of Has Batch No as ${this
-          .name!} already has transactions against it. `
-      );
-    }
-  }
-
   formulas: FormulaMap = {
     incomeAccount: {
       formula: async () => {
@@ -102,6 +76,29 @@ export class Item extends Doc {
         throw new ValidationError(this.fyo.t`Rate can't be negative.`);
       }
     },
+    hasBatchNumber: async (value: DocValue) => {
+      const { hasBatchNumber } = await this.fyo.db.get(
+        'Item',
+        this.name!,
+        'hasBatchNumber'
+      );
+
+      if (hasBatchNumber && value !== hasBatchNumber) {
+        const itemEntriesInSLE = await this.fyo.db.count(
+          ModelNameEnum.StockLedgerEntry,
+          {
+            filters: { item: this.name! },
+          }
+        );
+
+        if (itemEntriesInSLE > 0) {
+          throw new ValidationError(
+            this.fyo.t`Cannot change value of Has Batch No as Item ${this
+              .name!} already has transactions against it. `
+          );
+        }
+      }
+    },
   };
 
   static getActions(fyo: Fyo): Action[] {