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Where should Rails 3 custom validators be stored?
...o your /config/application.rb file:
config.autoload_paths += %W["#{config.root}/lib/validators/"]
Then Rails will automatically load your validators on start up (just like /config/initializers/), but you keep the clean structure of having your validators in one nice, well named spot.
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Should each and every table have a primary key?
...most probably, you are missing something. Why keep identical records?
In MySQL, the InnoDB storage engine always creates a primary key if you didn't specify it explicitly, thus making an extra column you don't have access to.
Note that a primary key can be composite.
If you have a many-to-many l...
Entity Framework vs LINQ to SQL
...oject "dblinq" replaces the LINQ to SQL assembly with one that can talk to MySQL, PostgreSQL, Ingres, Firebird, SQLite ... and Microsoft SQL (of course).
– Contango
Dec 24 '10 at 11:41
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Libraries not found when using CocoaPods with iOS logic tests
... the "User-Defined" build settings. The Header Search Paths refer to $PODS_ROOT which was not defined on the test target. You can add it by going to Editor->Add Build Setting->Add User-Defined Setting then copying the $PODS_ROOT value from the main target.
– Shinigami
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Java: Subpackage visibility?
...o this in IntelliJ, my source tree looks like this:
src // source root
- odp
- proj // .java source here
- test // test root
- odp
- proj // JUnit or TestNG source here
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How to split a dos path into its components in Python
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This doesn't seem to work for path = root. In that case, the result of path.split is ['','']. In fact in general, this split() solution gives a leftmost directory with empty-string name (which could be replaced by the appropriate slash). The core problem is th...
What is the optimal length for an email address in a database?
... then you can/must use a VARCHAR(254) to store an email address.
Note: In MySQL at least, a column declared as VARCHAR whit less or equal than 255 octets will be all stored as 1 byte + length (the 1 is to store the length) so no space is gained if used a lower limit.
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Add only non-whitespace changes
... if you have a handy alias to execute a bash command in the working tree's root. The incorrect formulation is:
sh = !bash -c '"$@"' -
While the correct one is:
sh = !bash -c '\"$@\"' -
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How can I join multiple SQL tables using the IDs?
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Not the answer you're looking for? Browse other questions tagged mysql sql join or ask your own question.
Rails: How do I create a default value for attributes in Rails activerecord's model? [duplicate]
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Note, MySQL doesn't allow default values on TEXT/BLOB columns. Otherwise this is the ideal solution
– Andrew Vit
Mar 20 '13 at 18:35
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