seeding

问题 I have a simulation done with the below function in R : ## Load packages and prepare multicore process library(forecast) library(future.apply) plan(multisession) library(parallel) library(foreach) library(doParallel) n_cores <- detectCores() cl <- makeCluster(n_cores) registerDoParallel(cores = detectCores()) set.seed(1) bootstrap1 <- function(n, phi){ ts <- arima.sim(n, model = list(ar=phi, order = c(1, 1, 0)), sd = 1) #ts <- numeric(n) #ts[1] <- rnorm(1) #for(i in 2:length(ts)) # ts[i] <- 2

问题 Hello I'm trying to create some seeds for my project, but I'm having trouble seeding the Many-To-Many relationship data to the db. My database looks like this: in TeacherSkills , Teacher_ID and Skill_ID are foreign keys for their tables ofcourse. My seeder looks like this protected override void Seed(Ability_Examen_ASP.Models.AbilityDbContext context) { if (!context.Skills.Any()) { context.Skills.Add(new Models.Skill { SkillName = "PHP" }); context.Skills.Add(new Models.Skill { SkillName =

问题 I create ASP.NET CORE application with ASP.NET CORE Identity. I create seed class for saving new users and roles for first startup application. Inside this seed class I get following error when I add Role To User. The INSERT statement conflicted with the FOREIGN KEY constraint "FK_AspNetUserRoles_AspNetUsers_UserId". The conflict occurred in database "DB_A14695_Elvinm", table "dbo.AspNetUsers", column 'Id'. The statement has been terminated. I used following class for Identity public class

问题 I'm using Django 2.0, Python 3.7, and MySql 5. I have the following two models, the second dependent on the first ... class CoopType(models.Model): name = models.CharField(max_length=200, null=False) class Meta: unique_together = ("name",) class Coop(models.Model): name = models.CharField(max_length=250, null=False) type = models.ForeignKey(CoopType, on_delete=None) address = AddressField(on_delete=models.CASCADE) enabled = models.BooleanField(default=True, null=False) phone =

问题 I'm using Django 2.0, Python 3.7, and MySql 5. I have the following two models, the second dependent on the first ... class CoopType(models.Model): name = models.CharField(max_length=200, null=False) class Meta: unique_together = ("name",) class Coop(models.Model): name = models.CharField(max_length=250, null=False) type = models.ForeignKey(CoopType, on_delete=None) address = AddressField(on_delete=models.CASCADE) enabled = models.BooleanField(default=True, null=False) phone =

问题 I have a Laravel project where I would like to insert above 900 cities into database as database seeding. For example I could do it this way: $state_id = State::whereName('state name')->pluck('id'); $city = new City(); $city->name = 'my city name'; $city->state_id = $state_id; $city->save(); and in my City model I have defined save as: public function save(array $options = array()) { $this->url = $this->createUrl($this->name); parent::save($options); } so it creates also url for the city. I

问题 I do everything by-the-book: Installed fresh Laravel 5.3.9 app (all my non-fresh apps produce the same error) run php artisan make:auth create migrations for a new table `php artisan make:migration create_quotations_table --create=quotations Schema::create('quotations', function (Blueprint $table) { $table->increments('id'); $table->string('text'); // my problem persists even with the below two columns commented out $table->integer('creator_id')->unsigned()->index('creator_id'); $table-

问题 I do everything by-the-book: Installed fresh Laravel 5.3.9 app (all my non-fresh apps produce the same error) run php artisan make:auth create migrations for a new table `php artisan make:migration create_quotations_table --create=quotations Schema::create('quotations', function (Blueprint $table) { $table->increments('id'); $table->string('text'); // my problem persists even with the below two columns commented out $table->integer('creator_id')->unsigned()->index('creator_id'); $table-

问题 I am having this strange behavior all of a sudden (i have compared my files in version control (tfs) to be sure i did not change anything and i didn't found anything different). I am seeding my database with some metadata and i see that it has a very strange behavior i never saw before. I am inserting a Entity "Product" and it inserts this entity 2 times , first insert is correct and has everything it should have, the other one has NULL properties (string values) but some (like datetimes)

问题 I'm attempting to seed my database using the data that I grabbed with the seed_dump gem, found here. Anyway, the seed file generated looks legit, but it seems to be falling afoul of the user model validation: ActiveRecord::RecordInvalid: Validation failed: Password can't be blank To give an idea the seed looks like this: User.create!([ {email: "1234@localhost", encrypted_password: "$2a$10$5eoHh6M2q4GjGkHClO.NqebWWhS94D8rNj5Ot6CB2qrbn7IrTfkSa", reset_password_token: nil, reset_password_sent_at