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How to define two fields “unique” as couple
...ple:
class MyModel(models.Model):
field1 = models.CharField(max_length=50)
field2 = models.CharField(max_length=50)
class Meta:
unique_together = ('field1', 'field2',)
And in your case:
class Volume(models.Model):
id = models.AutoField(primary_key=True)
journal_id = models.Foreign...
Difference between Document-based and Key/Value-based databases?
...u to do basic queries by value, such as "Give me all users with more than 10 posts". Document databases are more flexible in this way.
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When should I use jQuery deferred's “then” method and when should I use the “pipe” method?
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Since jQuery 1.8 .then behaves the same as .pipe:
Deprecation Notice: As of jQuery 1.8, the de...
TFS checkin error - could not find file
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jessehouwing
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answered Oct 16 '13 at 18:58
doingwebdoingweb
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Comparator.reversed() does not compile using lambda
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Stuart MarksStuart Marks
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“int main (vooid)”? How does that work?
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220
It's simply using the "old-style" function-declaration syntax; you're implicitly declaring an in...
What's the difference between “version number” in iTunes Connect, “bundle version”, “bundle version
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edited Feb 21 '13 at 8:03
answered Sep 2 '11 at 8:58
Fab...
What can I do with a moved-from object?
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edited Mar 26 '16 at 9:09
JDługosz
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Why did Bootstrap 3 switch to box-sizing: border-box?
I'm migrating my Bootstrap themes from v2.3.2 to v3.0.0 and one thing I noticed is that a lot of dimensions are calculated differently, due to the following styles in bootstrap.css.
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What's the difference between String(value) vs value.toString()
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edited Jun 12 '18 at 20:21
Incinirate
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answered Oct 15 '10 at 18:59
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