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how to permit an array with strong parameters
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params.require(:question).permit(:question_details, :question_content, :user_id, :accepted_answer_id, :province_id, :city, :category_ids => [])
Works perfectly now!
(IMPORTANT: As @Lenart notes in the comments, the array declarations must be at the end of the attributes list, otherwise you'...
Does SQLAlchemy have an equivalent of Django's get_or_create?
...s, it is automatically added to the session. E.g. create a book, which has user_id and user as corresponding relationship, then doing book.user=<user object> inside of create_method will add book to the session. This means that create_method must be inside with to benefit from an eventual roll...
What's the difference between belongs_to and has_one?
...s. We can say that a User "has" a Profile because the profiles table has a user_id column. If there was a column called profile_id on the users table, however, we would say that a Profile has a User, and the belongs_to/has_one locations would be swapped.
here is a more detailed explanation.
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sqlalchemy: how to join several tables by one query?
...om"
).all()
One note about that...
query.join(Address, User.id==Address.user_id) # explicit condition
query.join(User.addresses) # specify relationship from left to right
query.join(Address, User.addresses) # same, with explicit target
query.join('addresses') ...
What does Python's eval() do?
...n a virtual machine to prevent malicious code from doing anything bad. Far more complicated than a simple eval. Also, eval is Python-specific. codepad supports a bunch of languages.
– FogleBird
Feb 21 '12 at 20:16
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Sanitizing strings to make them URL and filename safe?
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How to replace a character by a newline in Vim
...in substitutions \n inserts a null character whereas \r inserts a newline (more precisely, it’s treated as the input CR). Here’s a small, non-interactive example to illustrate this, using the Vim command line feature (in other words, you can copy and paste the following into a terminal to run it...
How do you get a query string on Flask?
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PHP exec() vs system() vs passthru()
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@Kalium: can you elaborate more on your statement? just stating some vague percentage statistics does not convince me. I believe that using system calls to execute scripts are totally fine as long as the whole application does not depend one a bunch of...
How do I deal with certificates using cURL while trying to access an HTTPS url?
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