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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') ...
vim repeat find next character 'x'
...he need for ; almost unnecessary.
This plugin allows to jump to a certain letter directly - triggering the plugin makes all letters grey except for all 'x' on the screen - and those are replaced by red letters which you can press to jump directly to it.
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How do you get a query string on Flask?
... ask yourself why you want the query string. I've never had to pull in the raw string - Flask has mechanisms for accessing it in an abstracted way. You should use those unless you have a compelling reason not to.
share
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How do you allow spaces to be entered using scanf?
... like 1234567890s where the s will be consumed but put no where. An other letter won't be consumed. If you put another format after the s, it will be read only if there is an s to be matched.
– AProgrammer
Aug 8 '09 at 11:52
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Why is x86 ugly? Why is it considered inferior when compared to others? [closed]
...atures. An instruction listing for a typical MIPS machine fits on a single letter sized piece of paper. The equivalent listing for x86 fills several pages, and the instructions just do more, so you often need a bigger explanation of what they do than a listing can provide. For example, the MOVSB ins...
detect key press in python?
... p for pause and s for stop), and I would not like it to be something like raw_input that waits for the user's input before continuing execution. Anyone know how to do this in a while loop?
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Single quotes vs. double quotes in Python [closed]
...tain quotes, or if I forget. I use triple double quotes for docstrings and raw string literals for regular expressions even if they aren't needed.
For example:
LIGHT_MESSAGES = {
'English': "There are %(number_of_lights)s lights.",
'Pirate': "Arr! Thar be %(number_of_lights)s lights."
}
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Naming of ID columns in database tables
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Kevin, same as you. for example: user_id, role_id for PKey, and role_user_id for FKey. It is good on a large scale project. Because if all ID field are named to "id", it is too confuse. But i think it is personal preference, somebody think only use "id" are ...
Ukkonen's suffix tree algorithm in plain English
...we DON'T connect the nodes through a suffix link:
before adding the last letter c:
after adding the last letter c:
If we DO connect the nodes through a suffix link:
before adding the last letter c:
after adding the last letter c:
Seems like there is no significant difference: i...