migration

问题 Edit: SOLVED I had a line like creator = models.ForeignKey(User, on_delete=models.CASCADE, default=User.objects.first().id) that was the problem. When I changed it to creator = models.ForeignKey(User, on_delete=models.CASCADE) all started to work again. Thanks. I know that it is a recurrent ask, which it's solutioned with migrations, but not my case (I think). I have a Django project (I've tried with Django 2.0, 2.1 and 2.1.1) that had a db.sqlite3 and worked fine. Now, I've tried to switch

问题 Edit: SOLVED I had a line like creator = models.ForeignKey(User, on_delete=models.CASCADE, default=User.objects.first().id) that was the problem. When I changed it to creator = models.ForeignKey(User, on_delete=models.CASCADE) all started to work again. Thanks. I know that it is a recurrent ask, which it's solutioned with migrations, but not my case (I think). I have a Django project (I've tried with Django 2.0, 2.1 and 2.1.1) that had a db.sqlite3 and worked fine. Now, I've tried to switch

问题 Background I'm working on a big project with multiple large solutions. All in all we have over 400 C#-Projects. In the past we used Nuget with the packages.config file for our dependencies. Now we want to migrate all of the projects to the new PackageReference format. Problem I know Visual Studio provides a solution for migrating a single project from packages.config to the PackageReference format, but I'm not aware of a solution where I can migrate multiple Visual Studio Solutions at once. I

问题 I'm trying to modify a existing migration. Here is my current migration class: class CreateLogForUserTable extends Migration { public function up() { Schema::create('log_for_user', function (Blueprint $table) { $table->increments('id'); $table->integer('user_id'); $table->string('table_name'); $table->string('error_message'); $table->unsignedTinyInteger('error_code'); $table->timestamps(); }); } public function down() { Schema::drop('log_for_user'); } } I've executed the php artisan migrate

问题 This question already has answers here : AngularJS 1.4 --> Angular 9 migration [duplicate] (2 answers) Closed 8 days ago . I have done a ton of research and haven't found anything that has helped me decide what will be the best route (vertical slicing, horizontal slicing, or just a complete rewrite). I am working on a very LARGE program that is very ugly with no comments and need to migrate it over to Angular 8 if possible or at least up to Angular 7. A lot seem to recommend https://angular

问题 I was referring a wonderful tutorial Swift Core Data Tutorial for migrations in core data. The tut stated that migrations in core data go hand in hand with multiple versions of data model. I was experimenting on light-weight migrations and got to figure out the following points: Scenario - I had a data model and I tried to add a some new attributes to an entity and I got an error as - iOS Version - 9.1 Swift Version - 2.2 "The model used to open the store is incompatible with the one used to

问题 I've been working on a Processing project for a while, and now want to move it into Eclipse. I've installed Proclipse with my Eclipse environment. I've a lot of files with the extension of ".pde". However the Proclipse files all ends with ".java". And there's a lot of dependency issues with all the pde files. How should I convert my project? =============== Thanks everyone! There doesn't seem to be a one-button solution, I refactored all the code following an approach similar to George's

问题 I've been working on a Processing project for a while, and now want to move it into Eclipse. I've installed Proclipse with my Eclipse environment. I've a lot of files with the extension of ".pde". However the Proclipse files all ends with ".java". And there's a lot of dependency issues with all the pde files. How should I convert my project? =============== Thanks everyone! There doesn't seem to be a one-button solution, I refactored all the code following an approach similar to George's

问题 Im trying to create a foreign keys using artisan , but this error show up. [Illuminate\Database\QueryException] SQLSTATE[HY000]: General error: 1215 Cannot add foreign key constraint (SQL: alter table `comments` add constraint `comments_comment_lot_id_foreign` foreign key (`comment_lot_id`) references `lots` (`lot_id` ) on delete cascade) This is my migration: <?php use Illuminate\Support\Facades\Schema; use Illuminate\Database\Schema\Blueprint; use Illuminate\Database\Migrations\Migration;

问题 I'm trying to migrate to androidx and i'm facing the following issue: Databinding generates classes that includes android.support.. instead of androidx.. . Does anyone have an ideea about how to replace android.support.. with androidx.. ? I'm using Android Studio 3.2, build gradle version is : 3.2.0. Here is an example of bad generated imports: import android.support.design.widget.AppBarLayout; import android.support.design.widget.CollapsingToolbarLayout; import android.support.v7.widget