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How do I include related model fields using Django Rest Framework?
... quite what you need, since the teachers field is a reverse relationship.
If you've got more complex requirements (eg. include reverse relationships, nest some fields, but not others, or nest only a specific subset of fields) you can nest serializers, eg...
class TeacherSerializer(serializers.Mode...
Error - trustAnchors parameter must be non-empty
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This bizarre message means that the truststore you specified was:
empty,
not found, or
couldn't be opened (due to access permissions for example).
See also @AdamPlumb's answer below.
To debug this issue (I wrote about it here) and understand what truststore is being used you...
Jenkins Host key verification failed
...(yes/no)?
Type yes and press Enter. The host key for bitbucket.org will now be added to the ~/.ssh/known_hosts file and you won't get this error in Jenkins anymore.
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Get Output From the logging Module in IPython Notebook
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For anyone trying to do this in Python 3: reload is now imp.reload
– kuzzooroo
Jan 15 '15 at 17:09
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ANTLR: Is there a simple example?
...message, and the files ExpLexer.java, ExpParser.java and Exp.tokens should now be generated.
To see if it all works properly, create this test class:
import org.antlr.runtime.*;
public class ANTLRDemo {
public static void main(String[] args) throws Exception {
ANTLRStringStream in = n...
What are enums and why are they useful?
...s (contract status: "permanent", "temp", "apprentice"), or flags ("execute now", "defer execution").
If you use enums instead of integers (or String codes), you increase compile-time checking and avoid errors from passing in invalid constants, and you document which values are legal to use.
BTW, o...
Django: Why do some model fields clash with each other?
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It should also be mentioned that if you do not need to use the reverse relations for all models. In some cases you might wish the model relation to be one way. In this case you use related_name='+'. This tells Django to create a one way relation and ignore t...
How do I create a parameterized SQL query? Why Should I?
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';DROP TABLE bar;--
Try putting that in your fuz variable (or don't, if you value your bar table). More subtle and damaging queries are possible as well.
Here's an example of how you do parameters with Sql Server:
Public Function GetBarFooByBaz(ByVal Baz As String) As String
Dim sql As ...
Is it possible to download an old APK for my app from Google Play?
...ns to my app. Unfortunately, I didn't keep copies of all the old APKs, and now I'd like to test upgrade from the old versions to my new version. Is there any way to download Google's copy of my old versions? The Google Play developer console shows my old APKs, but without a download link. I tried "R...
Java: notify() vs. notifyAll() all over again
...his is the accepted answer, it's not a question of personal pride. If you know you were wrong now, please edit your answer to say it, and point to e.g. xagyg pedagogic and correct answer below.
– Yann TM
May 5 '17 at 21:15
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