partial update transaction work with stock product

app/Models/Product.php

@@ -47,4 +47,26 @@ class Product extends Model
     {
         return $this->stocks()->where('dealer_id', $dealerId)->first()?->quantity ?? 0;
     }
+
+    /**
+     * Get all works that require this product
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsToMany
+     */
+    public function works()
+    {
+        return $this->belongsToMany(Work::class, 'work_products')
+                    ->withPivot('quantity_required', 'notes')
+                    ->withTimestamps();
+    }
+
+    /**
+     * Get work products pivot records
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\HasMany
+     */
+    public function workProducts()
+    {
+        return $this->hasMany(WorkProduct::class);
+    }
 }

app/Models/Transaction.php

@@ -16,10 +16,40 @@ class Transaction extends Model
     /**
      * Get the work associated with the Transaction
      *
-     * @return \Illuminate\Database\Eloquent\Relations\HasOne
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
      */
     public function work()
     {
-        return $this->hasOne(Work::class, 'id', 'work_id');
+        return $this->belongsTo(Work::class, 'work_id', 'id');
+    }
+
+    /**
+     * Get the dealer associated with the Transaction
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function dealer()
+    {
+        return $this->belongsTo(Dealer::class);
+    }
+
+    /**
+     * Get the user who created the transaction
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function user()
+    {
+        return $this->belongsTo(User::class);
+    }
+
+    /**
+     * Get the SA user associated with the transaction
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function userSa()
+    {
+        return $this->belongsTo(User::class, 'user_sa_id');
     }
 }

app/Models/Work.php

@@ -22,4 +22,36 @@ class Work extends Model
     {
         return $this->hasMany(Transaction::class, 'work_id', 'id');
     }
+
+    /**
+     * Get all products required for this work
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsToMany
+     */
+    public function products()
+    {
+        return $this->belongsToMany(Product::class, 'work_products')
+                    ->withPivot('quantity_required', 'notes')
+                    ->withTimestamps();
+    }
+
+    /**
+     * Get work products pivot records
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\HasMany
+     */
+    public function workProducts()
+    {
+        return $this->hasMany(WorkProduct::class);
+    }
+
+    /**
+     * Get the category associated with the Work
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function category()
+    {
+        return $this->belongsTo(Category::class);
+    }
 }

app/Models/WorkProduct.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class WorkProduct extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'work_id',
+        'product_id', 
+        'quantity_required',
+        'notes'
+    ];
+
+    protected $casts = [
+        'quantity_required' => 'decimal:2'
+    ];
+
+    public function work()
+    {
+        return $this->belongsTo(Work::class);
+    }
+
+    public function product()
+    {
+        return $this->belongsTo(Product::class);
+    }
+}