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Django errors while working with components
1) OperationalError at /admin/csv_app/invoicefile/add/ no such table: csv_app_invoicefile ==>solve this error by cmd makemigrations csv_app migrate 2)System check identified no issues (0 silenced). You have 6 unapplied migration(s). Your project may not work properly until you apply the migrations for app(s): csv_app. Run ‘python manage.py migrate’ to apply them. July 13, 2021 – 14:55:01 Django version 3.2.5, using settings ‘proj3.settings’ Starting development server at http://127.0.0.1:8000/ Quit the server with CTRL-BREAK. ==>to fix this error, go to cmd enter: $python manage.py makemigrations csv_app $python manage.py migrate…
Inner class Meta
In Django this class works like post_meta in WordPress. In Django, it acts as a configuration class and keeps the configuration data in one place. Class Meta is the place in your code logic where your model.fields MEET With your form.widgets. So under Class Meta() you create the link between your model’ fields and the different widgets you want to have in your form. Model metadata is “anything that’s not a field”, such as ordering options (ordering), database table name (db_table), or human-readable singular and…
OperationalError, no such column.
OperationalError at /orders/ no such column: orders.customer_id Request Method: GET Request URL: http://localhost:9000/orders/ Django Version: 3.1.2 Exception Type: OperationalError Exception Value: no such column: orders.customer_id Exception Location: /Users/xxx/django/db/backends/sqlite3/base.py in execute, line 355 Python Executable: /Users/xxx/Programs/Python/Python38-32 Python Version: 3.8.1 You are trying to add a non-nullable field ‘customer_id’ to snippet without a default; we can’t do that (the database needs something to populate existing rows). Please select a fix: 1) Provide a one-off default now (will be set on all existing rows) 2) Quit, and let…
Query that returns two character records from MySQL table
Today I will show you how to get records of 2 characters that are mixed in with multiple character records. This particular example I experienced from my work. All 52 states in US each has 2 names: full name and abbreviation name. For example: California is a full name and CA is its abbreviation. However in Canada a state has only full name. For example: Manitoba. The issue here is that when you have a state table in your database that contains the states of…