ft(backend): fix the null vendor email

Feat: Product Lifecycle Notification System #84

src/Notification.vendor/event.services.ts

@@ -214,7 +214,7 @@ eventEmitter.on('order_status_change', async (orderId:number) => {
 
 eventEmitter.on('productCreated', async(product:product)=>{
   try{
-       if(!product || !product.vendor)
+       if(!product || !product.vendor || !product.vendor.email)
         {
           return
         }
@@ -239,11 +239,11 @@ eventEmitter.on('productCreated', async(product:product)=>{
 eventEmitter.on('product_updated', async(product:product)=>{
 
   try{
-        if(!product || !product.vendor)
+        console.log('product_updated listed too')
+        if(!product || !product.vendor || !product.vendor.email)
           {
             return
           }
-
           const new_notification = new Notification_box();
           new_notification.product_id =product.id ;
           new_notification.vendor_id = product.vendor.id
@@ -267,7 +267,7 @@ eventEmitter.on('product_deleted', async(product_id:number)=>{
           where:{id: product_id},
           relations:['vendor']
         })
-        if(!product || !product.vendor)
+        if(!product || !product.vendor || !product.vendor.email)
           {
             return
           }

src/Notification.vendor/node.cron.services.ts

@@ -41,7 +41,7 @@ const dailyTasks = cron.schedule('0 0 * * *', async () => {
                 relations: ['vendor'],
                 });
 
-                if(!product)
+                if(!product || !product.vendor || !product.vendor.email)
                 {
                     return
                 }