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Get exception description and stack trace which caused an exception, all as a string
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Let's create a decently complicated stacktrace, in order to demonstrate that we get the full stacktrace:
def raise_error():
raise RuntimeError('something bad happened!')
def do_something_that_might_error():
raise_error()
Logging the full stacktrace
A best practic...
How do I force a favicon refresh?
I have a Grails application running locally using its own tomcat and I have just changed the favicon for a new one. Problem is that I can not see it in any browser. The old favicon shows up or I get no favicon at all, but not my new one. I do not think this is a Grails issue per se, more an issue...
Export database schema into SQL file
...ME
WHERE inf.TABLE_NAME = @TableName and inf.TABLE_SCHEMA=@schema
ORDER BY inf.ORDINAL_POSITION
'
print @sql
INSERT INTO @ShowFields( DatabaseName
,TableOwner
,TableName
,Fie...
How to shorten my conditional statements
...ilar to PHP), but that's just wishful thinking (Update: it now does. It's called includes. See above). Note that jQuery's inArray, while sharing PHP's method signature, actually mimics the native indexOf functionality (which is useful in different cases, if the index is what you're truly after).
Im...
Is gcc's __attribute__((packed)) / #pragma pack unsafe?
In C, the compiler will lay out members of a struct in the order in which they're declared, with possible padding bytes inserted between members, or after the last member, to ensure that each member is aligned properly.
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Why is iterating through a large Django QuerySet consuming massive amounts of memory?
...etching large items from database.
import gc
# Get the events in reverse order
eids = Event.objects.order_by("-id").values_list("id", flat=True)
for index, eid in enumerate(eids):
event = Event.object.get(id=eid)
# do necessary work with event
if index % 100 == 0:
gc.collect()
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How can I recover the return value of a function passed to multiprocessing.Process?
... @dano : I wonder, if we use Queue() object, we can not sure the order when each process return the value. I mean if we need the order in the result, to do the next work. How could we sure where exactly which output is from which process
– Catbuilts
S...
How can I get a list of all functions stored in the database of a particular schema in PostgreSQL?
...og.pg_namespace n ON n.oid = p.pronamespace WHERE n.nspname ~ '^(public)$' ORDER BY 1, 2, 4; Above is the query generated (from \set ECHO_HIDDEN 'on').
– Simon D
Jan 6 '18 at 9:03
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What is `related_name` used for in Django?
...his data
you only can use related name
bom = material.tomaterial.all().order_by('-creation_time')
It is not working otherwise (at least I was not able to skip the usage of related name in case of 2 FK's to the same table.)
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When to use EntityManager.find() vs EntityManager.getReference() with JPA
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So before transaction commit, JPA provider will see stateChanged flag in order to update OR NOT person entity. If no rows is updated after update statement, JPA provider will throw EntityNotFoundException according to JPA specification.
regards,
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