migrate

问题 I have a Python/Django proyect. Due to some rolls back, and other mixed stuff we ended up in a kind of odd scenario. The current scenario is like this: DB has the correct tables DB can't be rolled back or dropped Code is up to date Migrations folder is behind the DB by one or two migrations. (These migrations were applied from somewhere else and that "somewhere else" doesn't exist anymore) I add and alter some models I run makemigrations New migrations are created, but it's a mix of new

问题 When I try to use 'php artisan migrate' in Laravel I get 2 errors: [Illuminate\Database\QueryException] SQLSTATE[HY000]: General error: 26 file is encrypted or is not a database (SQL: select * from sqlite_master where type = 'table' and name = migrations) [PDOException] SQLSTATE[HY000]: General error: 26 file is encrypted or is not a database I created a storage/database.sqlite file before attempting the migration. I also edited the config/database.php, making the default=sqlite . I am using

问题 Working through this tutorial, I'm down to the following step: You should now be able to call migrate as many times as you want and it’ll work: php artisan migrate:refresh Upon running that command, I get the following errors: [Illuminate\Database\QueryException] SQLSTATE[42S02]: Base table or view not found: 1146 Table 'sdbd_todo.migrations' doesn't exist (SQL: select max( batch ) as aggregate from migrations ) [PDOException] SQLSTATE[42S02]: Base table or view not found: 1146 Table 'sdbd

问题 When migrating to AndroidX I faced this problem: Java.lang.RuntimeException: Unable to start activity ComponentInfo{com.mandarine.android/com.mandarine.android.features.root.RootActivity}: android.view.InflateException: Binary XML file line #18: Binary XML file line #18: Error inflating class android.support.design.widget.AppBarLayout 回答1: Unless you implement the old support libraries and enable Jetifier, you have to rename all your support classes in XML. android.support.design.widget

问题 I am a django beginner, and I am trying to make a child-parent like combo box, (bars depends on city depends on country) and I get this error. UPDATE: Changed the model and the default value for the foreign key, but still the same error. Any help? thanks! this is models.py: from django.db import models from smart_selects.db_fields import ChainedForeignKey DEFAULT_COUNTRY_ID = 1 # id of Israel class BarName(models.Model): name = models.CharField(max_length=20) def __unicode__(self): return

问题 How do you perform database migrations with Meteor? With Ruby on Rails there is ActiveRecord::Migration. Is there an equivalent mechanism in Meteor? For example, I make an app with some user data. I'm storing the data in Mongo using a JSON format. The app changes, and the JSON database schema needs to change. I can write a migration method to change the schema, however, I only want this to run if the server database is out of date. 回答1: There's nothing built in for this. What I've done myself

问题 so I've already created models in Django for my db, but now want to rename the model. I've change the names in the Meta class and then make migrations/migrate but that just creates brand new tables. I've also tried schemamigration but also not working, I'm using Django 1.7 Here's my model class ResultType(models.Model): name = models.CharField(max_length=150) ut = models.DateTimeField(default=datetime.now) class Meta: db_table = u'result_type' def __unicode__(self): return self.name Cheers

问题 so I've already created models in Django for my db, but now want to rename the model. I've change the names in the Meta class and then make migrations/migrate but that just creates brand new tables. I've also tried schemamigration but also not working, I'm using Django 1.7 Here's my model class ResultType(models.Model): name = models.CharField(max_length=150) ut = models.DateTimeField(default=datetime.now) class Meta: db_table = u'result_type' def __unicode__(self): return self.name Cheers

问题 When I run the following command python manage.py migrate I receive this error from django so can't step forward in my practice: Traceback (most recent call last): File "manage.py", line 10, in <module> execute_from_command_line(sys.argv) File "/home/nikhil/testWeb-devEnv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 385, in execute_from_command_line utility.execute() File "/home/nikhil/testWeb-devEnv/local/lib/python2.7/site-packages/django/core/management/_

问题 I need to outsource some of the attribues in the following Django model: class TextResult(models.Model): user = models.ForeignKey(settings.AUTH_USER_MODEL, default=1) text = models.ForeignKey(Text) # following fields will be in the referenced model wpm = models.FloatField(default=0.0) accuracy = models.FloatField(default=1.0, validators=[MinValueValidator(0.0), MaxValueValidator(1.0)]) to a model, that references to the specific data: class TextResult(models.Model): user = models.ForeignKey