decided to leave the posts.discussion_id foreign key constraint to discussions out for now

migrations/2018_01_11_155200_change_discussions_b8_columns.php

@@ -26,9 +26,9 @@ return [
             $table->renameColumn('hide_time', 'hidden_at');
             $table->renameColumn('hide_user_id', 'hidden_user_id');
 
-            $table->foreign('user_id')->references('id')->on('users');
+            $table->foreign('user_id')->references('id')->on('users')->onDelete('set null');
-            $table->foreign('last_posted_user_id')->references('id')->on('users');
+            $table->foreign('last_posted_user_id')->references('id')->on('users')->onDelete('set null');
-            $table->foreign('hidden_user_id')->references('id')->on('users');
+            $table->foreign('hidden_user_id')->references('id')->on('users')->onDelete('set null');
             $table->foreign('first_post_id')->references('id')->on('posts');
             $table->foreign('last_post_id')->references('id')->on('posts');
         });

migrations/2018_01_15_071800_change_discussions_users_b8_columns.php

@@ -18,7 +18,7 @@ return [
             $table->renameColumn('read_time', 'last_read_at');
             $table->renameColumn('read_number', 'last_read_post_number');
 
-            $table->foreign('user_id')->references('id')->on('users');
+            $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
             $table->foreign('discussion_id')->references('id')->on('discussions')->onDelete('cascade');
         });
     },

migrations/2018_01_18_130400_rename_permissions_to_groups_permissions.php

@@ -11,4 +11,4 @@
 
 use Flarum\Database\Migration;
 
-return Migration::renameTable('permissions', 'groups_permissions');
+return Migration::renameTable('permissions', 'group_permission');

migrations/2018_01_18_135000_change_posts_b8_columns.php

@@ -24,10 +24,9 @@ return [
 
             $table->longText('content')->change();
 
-            $table->foreign('discussion_id')->references('id')->on('discussions')->onDelete('cascade');
+            $table->foreign('user_id')->references('id')->on('users')->onDelete('set null');
-            $table->foreign('user_id')->references('id')->on('users');
+            $table->foreign('edited_user_id')->references('id')->on('users')->onDelete('set null');
-            $table->foreign('edited_user_id')->references('id')->on('users');
+            $table->foreign('hidden_user_id')->references('id')->on('users')->onDelete('set null');
-            $table->foreign('hidden_user_id')->references('id')->on('users');
         });
     },
 

migrations/2018_07_19_101301_constraints_group_permission.php

@@ -14,14 +14,14 @@ use Illuminate\Database\Schema\Builder;
 
 return [
     'up' => function (Builder $schema) {
-        $schema->table('groups_permissions', function (Blueprint $table) {
+        $schema->table('group_permission', function (Blueprint $table) {
             $table->foreign('group_id')->references('id')->on('groups')->onDelete('cascade');
         });
     },
 
     'down' => function (Builder $schema) {
-        $schema->table('group_user', function (Blueprint $table) {
+        $schema->table('group_permission', function (Blueprint $table) {
-            $table->dropForeign('group_user_group_id_foreign');
+            $table->dropForeign('group_permission_group_id_foreign');
         });
     }
 ];

src/Discussion/Discussion.php

@@ -400,7 +400,7 @@ class Discussion extends AbstractModel
      */
     public function readers()
     {
-        return $this->belongsToMany(User::class, 'discussions_users');
+        return $this->belongsToMany(User::class);
     }
 
     /**

src/Group/Group.php

@@ -121,7 +121,7 @@ class Group extends AbstractModel
      */
     public function users()
     {
-        return $this->belongsToMany(User::class, 'users_groups');
+        return $this->belongsToMany(User::class);
     }
 
     /**

src/Group/Permission.php

@@ -23,7 +23,7 @@ class Permission extends AbstractModel
     /**
      * {@inheritdoc}
      */
-    protected $table = 'groups_permissions';
+    protected $table = 'group_permission';
 
     /**
      * Define the relationship with the group that this permission is for.