[10.x] Determine if the given view exists. (#49231)

* add `Schema::hasView()`

* override `Schema::hasTable()` on SQL Server

* add a test

* formatting

---------

Co-authored-by: Taylor Otwell <taylor@laravel.com>

src/Illuminate/Database/Schema/Builder.php

@@ -168,6 +168,25 @@ public function hasTable($table)
         return false;
     }
 
+    /**
+     * Determine if the given view exists.
+     *
+     * @param  string  $view
+     * @return bool
+     */
+    public function hasView($view)
+    {
+        $view = $this->connection->getTablePrefix().$view;
+
+        foreach ($this->getViews() as $value) {
+            if (strtolower($view) === strtolower($value['name'])) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
     /**
      * Get the tables that belong to the database.
      *

src/Illuminate/Support/Facades/Schema.php

@@ -11,6 +11,7 @@
  * @method static bool createDatabase(string $name)
  * @method static bool dropDatabaseIfExists(string $name)
  * @method static bool hasTable(string $table)
+ * @method static bool hasView(string $view)
  * @method static array getTables()
  * @method static array getViews()
  * @method static bool hasColumn(string $table, string $column)

tests/Integration/Database/SchemaBuilderTest.php

@@ -164,6 +164,13 @@ public function testGetTables()
         }
     }
 
+    public function testHasView()
+    {
+        DB::statement('create view foo (id) as select 1');
+
+        $this->assertTrue(Schema::hasView('foo'));
+    }
+
     public function testGetViews()
     {
         DB::statement('create view foo (id) as select 1');