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Foreign Key to multiple tables
...pends on your needs.
You could simply create two columns in Ticket, OwnedByUserId and OwnedByGroupId, and have nullable Foreign Keys to each table.
You could create M:M reference tables enabling both ticket:user and ticket:group relationships. Perhaps in future you will want to allow a single tick...
How to debug Lock wait timeout exceeded on MySQL?
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What gives this away is the word transaction. It is evident by the statement that the query was attempting to change at least one row in one or more InnoDB tables.
Since you know the query, all the tables being accessed are candidates for being the culprit.
From there, you should be ...
What does iterator->second mean?
...d::tuple has a special helper function std::get for accessing its elements by index.
– Joseph Mansfield
Apr 28 '15 at 23:29
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Entity Framework 4 vs NHibernate [closed]
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+1 You're right. NH is just mature. EF will catch up by the end of the year. Version 4.0 has already made a dramatic entrance. Give it some time and it'll be bullet-proof by mid 2011.
– Sergey
Jan 18 '10 at 7:57
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How to make the 'cut' command treat same sequental delimiters as one?
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$ awk '{print $4}' a
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This reads the fields sequentially. By using _ we indicate that this is a throwaway variable as a "junk variable" to ignore these fields. This way, we store $myfield as the 4th field in the file, no matter the spaces in between them.
$ while read -r _ _ _ a _;...
Connecting to Azure website via FTP
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In the current azure portal the deployment credentials can be set by going to App Services / select relevant app service item / in the Deployment section / Deployment Center / FTP / Dashboard. You can either chose to use the preprovided App Credentials or assign User Credentials.
In the pr...
Duplicate headers received from server
... Why .Replace(";", "").Replace(",", "") when already replacing by RegEx? Add ;, to your RegEx pattern: string invalidReStr = string.Format(@"[{0};,]+", invalidChars); string replace = Regex.Replace(name, invalidReStr, "_");
– SBF
Oct 23 '19 at 14:05...
Unlink of file Failed. Should I try again?
...ile. The file may not be actually open in eclipse but may have been opened by a process run by eclipse.
In this event, try closing the file in any applications that might have used it. If that doesn't work, completely exit any applications which may have opened the file.
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How to debug Apache mod_rewrite
...ite RewriteLog and RewriteLogLevel directives has been completely replaced by the new per-module logging configuration.
LogLevel alert rewrite:trace6
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Why Qt is misusing model/view terminology?
...On their explanation page they state, that they simplified the MVC to MV by merging View and Controller and they are giving the following picture:
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