database migration error

app/Contracts/ScheduleServiceContract.php

@@ -16,4 +16,5 @@ interface ScheduleServiceContract
     public function update($id ,$title ,$content ,$ends_at ,$starts_at);
     public function get($id);
     public function getAll();
+    public function getCount();
 }
\ No newline at end of file

app/Contracts/TaskServiceContract.php

@@ -13,4 +13,5 @@ interface TaskServiceContract
 {
 
     public function getAll();
+    public function getTaskCount();
 }
\ No newline at end of file

app/Http/Controllers/StatisticsController.php

@@ -43,10 +43,10 @@ class StatisticsController extends Controller
         $projects = count(Project::all());
 
         // 获取所有的任务
-        $tasks = $this->mTask->getAll()->count();
+        $tasks = $this->mTask->getTaskCount();
 
         // 获取所有日程
-        $schedules = $this->mSchedule->getAll()->count();
+        $schedules = $this->mSchedule->getCount();
 
 
         return view('admin/index',compact('newUserCount','newProject','users','projects','tasks','schedules'));

app/Services/AdminService.php

@@ -50,7 +50,7 @@ class AdminService implements AdminServiceContract
         $admin->password = bcrypt($password);
         $admin->save();
         if ($admin) {
-            if (count($roles) > 0) {
+            if ($roles!=null) {
                 foreach ($roles as $role) {
                     $adminRole = new RoleAdmin();
                     $adminRole->admin_id = $admin->id;

app/Services/ScheduleService.php

@@ -85,4 +85,9 @@ class ScheduleService implements ScheduleServiceContract
             return $schedules;
         }
     }
+
+    public function getCount()
+    {
+        return Schedule::count();
+    }
 }
\ No newline at end of file

app/Services/TaskService.php

@@ -23,4 +23,9 @@ class TaskService implements TaskServiceContract
         }
         return $tasks;
     }
+
+    public function getTaskCount()
+    {
+        return Task::count();
+    }
 }
\ No newline at end of file

database/migrations/2017_11_28_142018_entrust_setup_tables.php

@@ -29,7 +29,7 @@ class EntrustSetupTables extends Migration
                 ->onUpdate('cascade')->onDelete('cascade');
             $table->foreign('role_id')->references('id')->on('roles')
                 ->onUpdate('cascade')->onDelete('cascade');
-
+            $table->increments("id");
             $table->primary(['admin_id', 'role_id']);
         });