Fix issue 515: Cannot create a new tenant with a different different db host

src/Database/DatabaseManager.php

@@ -72,6 +72,23 @@ class DatabaseManager
         $this->app['config']['database.connections.tenant'] = $tenant->database()->connection();
     }
 
+    /**
+     * Create the tenant's host database connection.
+     */
+    public function createHostConnection(TenantWithDatabase $tenant)
+    {
+        $this->originalTemplate = $this->app['config']["database.connections.{$tenant->database()->getTemplateConnectionName()}"];
+        $this->app['config']["database.connections.{$tenant->database()->getTemplateConnectionName()}"] = $tenant->database()->hostConnection();
+    }
+
+    /**
+     * Reset the tenant database connection.
+     */
+    public function resetTenantConnection(TenantWithDatabase $tenant)
+    {
+        $this->app['config']["database.connections.{$tenant->database()->getTemplateConnectionName()}"] = $this->originalTemplate;
+    }
+
     /**
      * Check if a tenant can be created.
      *

src/DatabaseConfig.php

@@ -117,6 +117,20 @@ class DatabaseConfig
         );
     }
 
+    /**
+     * Tenant host's database connection config. Used for
+     * creating and deleting the tenant database.
+     */
+    public function hostConnection(): array
+    {
+        $template = $this->getTemplateConnectionName();
+        $templateConnection = config("database.connections.{$template}");
+
+        return $this->manager()->makeConnectionConfig(
+            array_merge($templateConnection, $this->tenantConfig()), $templateConnection['database']
+        );
+    }
+
     /**
      * Additional config for the database connection, specific to this tenant.
      */

src/Jobs/CreateDatabase.php

@@ -29,6 +29,9 @@ class CreateDatabase implements ShouldQueue
 
     public function handle(DatabaseManager $databaseManager)
     {
+        // update the connection to use the tenant's config
+        $databaseManager->createHostConnection($this->tenant);
+
         event(new CreatingDatabase($this->tenant));
 
         // Terminate execution of this job & other jobs in the pipeline
@@ -41,5 +44,8 @@ class CreateDatabase implements ShouldQueue
         $this->tenant->database()->manager()->createDatabase($this->tenant);
 
         event(new DatabaseCreated($this->tenant));
+
+        // revert the configuration to the original template
+        $databaseManager->resetTenantConnection($this->tenant);
     }
 }

src/Jobs/DeleteDatabase.php

@@ -10,6 +10,7 @@ use Illuminate\Foundation\Bus\Dispatchable;
 use Illuminate\Queue\InteractsWithQueue;
 use Illuminate\Queue\SerializesModels;
 use Stancl\Tenancy\Contracts\TenantWithDatabase;
+use Stancl\Tenancy\Database\DatabaseManager;
 use Stancl\Tenancy\Events\DatabaseDeleted;
 use Stancl\Tenancy\Events\DeletingDatabase;
 
@@ -25,12 +26,18 @@ class DeleteDatabase implements ShouldQueue
         $this->tenant = $tenant;
     }
 
-    public function handle()
+    public function handle(DatabaseManager $databaseManager)
     {
+        // update the connection to use the tenant's config
+        $databaseManager->createHostConnection($this->tenant);
+
         event(new DeletingDatabase($this->tenant));
 
         $this->tenant->database()->manager()->deleteDatabase($this->tenant);
 
         event(new DatabaseDeleted($this->tenant));
+
+        // revert the configuration to the original template
+        $databaseManager->resetTenantConnection($this->tenant);
     }
 }