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How to set a Django model field's default value to a function call / callable (e.g., a date relative
... to create a field in the class.
PRE Django 1.7
Django lets you pass a callable as the default, and it will invoke it each time, just as you want:
from datetime import datetime, timedelta
class MyModel(models.Model):
# default to 1 day from now
my_date = models.DateTimeField(default=lambda: ...
Spring Data JPA find by embedded object property
...
According to me, Spring doesn't handle all the cases with ease. In your case
the following should do the trick
Page<QueuedBook> findByBookIdRegion(Region region, Pageable pageable);
or
Page<QueuedBook> findByBookId_Region(Region region, Pageable ...
AngularJS-Twig conflict with double curly braces
...erpolation by Twig so you have to be more careful with the contents, especially if you are using expressions.
If you still hate seeing all those curly braces, you can also create a simple macro to automate the process:
{% macro curly(contents) %}
{{ '{{' ~ contents ~ '}}' }}
{% endmacro %}
...
What should main() return in C and C++?
...d termination) according to the C++ standard. For C, re-entering main() is allowed, but should be avoided.
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Show all Elasticsearch aggregation results/buckets and not just 10
I'm trying to list all buckets on an aggregation, but it seems to be showing only the first 10.
4 Answers
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Perform .join on value in array of objects
...Array.prototype.map is what you're looking for if you want to code functionally.
[
{name: "Joe", age: 22},
{name: "Kevin", age: 24},
{name: "Peter", age: 21}
].map(function(elem){
return elem.name;
}).join(",");
In modern JavaScript:
[
{name: "Joe", age: 22},
{name: "Kevin", age: 2...
What are the “standard unambiguous date” formats for string-to-date conversion in R?
...te (+1). However, the error message "standard unambiguous format" is ironically ambiguous, to which the 23 previous questions attest. A more direct error message like, "format not recognized, see documentation" might improve user experience. Also, I don't believe "01/01/2000" is ISO-8601 ("2000-01-0...
Javascript Shorthand for getElementById
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@patrick dw I like that. Especially with the wealth of valid variable names out there :)
– Fox Wilson
Jun 18 '11 at 20:56
4
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SQL WHERE.. IN clause multiple columns
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or more generally SELECT * FROM table INNER JOIN otherTable ON ( table.x = otherTable.a AND table.y = otherTable.b)
– ala
Jul 16 '09 at 7:56
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_=> what does this underscore mean in Lambda expressions?
What does an lambda expression like _=> expr mean?
5 Answers
5
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