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The relationship could not be changed because one or more of the foreign-key properties is non-nulla
...ld entities cannot live alone without a reference to any parent in the database (due to the foreign key constraint). That's basically what the exception says.
Edit
What I would do if child items could be added, updated and deleted:
public void UpdateEntity(ParentItem parent)
{
// Load origin...
json.dumps vs flask.jsonify
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Why are exclamation marks used in Ruby methods?
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Brian CarperBrian Carper
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What's causing my java.net.SocketException: Connection reset? [duplicate]
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64
The javadoc for SocketException states that it is
Thrown to indicate that there is an error...
Managing CSS Explosion
...oney well spent). There are free ones around as well (e.g. Code Beautifier based on CSS Tidy, an open-source tool).
Build sensible classes. See below for a few notes on this.
Use semantics, avoid DIV soup - use <ul>s for menus, for example.
Define everything on as low a level as possible (e.g...
How do I format a long integer as a string without separator in Java?
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64
Just use Long.toString(long foo)
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Pushing to Git returning Error Code 403 fatal: HTTP request failed
...and want to push back out to the GitHub server. Using Cygwin on Windows 7 x64.
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How to return result of a SELECT inside a function in PostgreSQL?
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How to copy from current position to the end of line in vi
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how to add script src inside a View when using Layout
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