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ERROR 1452: Cannot add or update a child row: a foreign key constraint fails
... table. Following query would be helpful to fetch those non-matching rows:
SELECT child_table.*
FROM child_table
LEFT JOIN parent_table
ON parent_table.referenced_column = child_table.referencing_column
WHERE parent_table.referenced_column IS NULL
Now, you can generally do one (or more) of th...
how to reset
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@jakerella that's strange, for me, set an input file selector value trigs a Security exception. The only solution I successfully use is $(#myfileselector).trigger('fileselect', [1, ""]);
– fralbo
May 9 '16 at 7:48
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How to clean project cache in Intellij idea like Eclipse's clean?
... into Settings (File > Settings or ctrl+alt+S). Under Project Settings, select the "Compiler" node. On the left, uncheck "Clear output directory on rebuild".
Note that this is a per project setting. If desired, change it in the project template settigs (Settings > Other Settings > Templat...
Script not served by static file handler on IIS7.5
...'.
Most probably its a last file in the list.
Then Right Click on it and Select 'Revert To Parent'.
I have wasted so many hours while i have faced this first time, anyways this will solve your problem.
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...
Get index of array element faster than O(n)
...gt; [6] }
This allows for a quick search for duplicate entries:
indices.select { |k, v| v.size > 1 }
=> { 1 => [0, 3], 2 => [1, 4], 3 => [2, 5] }
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...
Delete all local changesets and revert to tree
... get out of a (small) mess is to first update to the latest revision, then select your changesets and initiate "merge with local". When the merge dialogue appears, simply click the little '+' icon to reveal some extra options, one of which is "discard changesets from merge target (other) revision". ...
Best timestamp format for CSV/Excel?
...
Go to the language settings in the Control Panel, then Format Options, select a locale and see the actual date format for the chosen locale used by Windows by default. Yes, that timestamp format is locale-sensitive. Excel uses those formats when parsing CSV.
Even further, if the locale uses cha...
“No X11 DISPLAY variable” - what does it mean?
... application called 'XLaunch' and verify that the settings are as shown:
select Default entries on Display Settings windows, click next
click next on Session Type window.
click next on Additional parameters window(Notice clipboard checkbox is true)
save configuration and click to finish.
Configu...
What is an ORM, how does it work, and how should I use one? [closed]
...anually, you would do something like that:
book_list = new List();
sql = "SELECT book FROM library WHERE author = 'Linus'";
data = query(sql); // I over simplify ...
while (row = data.next())
{
book = new Book();
book.setAuthor(row.get('author');
book_list.add(book);
}
With an ORM ...
How to test a merge without actually merging first
...g Sourcetree.
You must click with the right button on the base branch and select Diff Against Current:
Then sourcetree will show you all the modifications that will be merged if you merge your branch into base branch.