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AttributeError: 'module' object has no attribute
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I have also seen this error when inadvertently naming a module with the same name as one of the standard Python modules. E.g. I had a module called commands which is also a Python library module. This proved to be difficult to track down as it w...
Which is the best library for XML parsing in java [closed]
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answered Feb 20 '11 at 19:05
ChrisJChrisJ
4,7751818 silver badges1818 bronze badges
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Can table columns with a Foreign Key be NULL?
...affected (0.01 sec)
INSERT INTO child (id, parent_id) VALUES (2, 1);
-- ERROR 1452 (23000): Cannot add or update a child row: a foreign key
-- constraint fails (`t/child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY
-- (`parent_id`) REFERENCES `parent` (`id`))
The first insert will pass because we i...
Relational table naming convention [closed]
...e it assists in resolving the model, ie. clarifying relations, identifying errors, and correcting the table names.
Diagram_A
Of course, the relationship is implemented in SQL as a CONSTRAINT FOREIGN KEY in the child table (more, later). Here is the Verb Phrase (in the model), the Predicate that...
Add IIS 7 AppPool Identities as SQL Server Logons
... it will try to treat it as such...which won't work, and will give you the error message about it not being found).
How I've gotten it to work is:
In SQL Server Management Studio, look for the Security folder (the security folder at the same level as the Databases, Server Objects, etc. folders.....
What is the most useful script you've written for everyday life? [closed]
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edited Mar 8 '12 at 15:05
community wiki
4 r...
What is the difference between `after_create` and `after_save` and when to use which?
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edited Apr 22 '17 at 8:05
answered Apr 10 '17 at 14:13
p...
“The Controls collection cannot be modified because the control contains code blocks”
... add a AjaxToolkit SliderExtender to the user control I get this (*&$#()@# error:
22 Answers
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Can I set variables to undefined or pass undefined as an argument?
...s operand is a simple variable that does not exist, instead of throwing an error as would normally happen if you tried to refer to it. (You can also give it a simple variable wrapped in parentheses, but not a full expression involving a non-existant variable.) Not much use for that, either.
This is ...
vertical divider between two columns in bootstrap
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edited Sep 23 '15 at 17:05
answered Sep 23 '15 at 16:42
B...