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Rails 3 execute custom sql query without a model
I need to write a standalone ruby script that is supposed to deal with database. I used code given below in rails 3
5 Answe...
Using Html.ActionLink to call action on different controller
...
As of 2019, this feature is implemented in ReSharper by JetBrains. It's actually very helpful for this circumstance.
– Jamie
Jul 25 '19 at 18:13
add a co...
INSERT … ON DUPLICATE KEY (do nothing)
...:
simple.
cons:
too slow.
auto-increment key will CHANGE(increase by 1) if there is entry matches unique key or primary key, because it deletes the old entry then insert new one.
2. INSERT IGNORE
pros:
simple.
cons:
auto-increment key will not change if there is entry matches uni...
What is the difference between inversedBy and mappedBy?
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mappedBy has to be specified on the inversed side of a (bidirectional) association
inversedBy has to be specified on the owning side of a (bidirectional) association
from doctrine documentation:
ManyToOne is always the owning s...
SQL/mysql - Select distinct/UNIQUE but return all columns?
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You're looking for a group by:
select *
from table
group by field1
Which can occasionally be written with a distinct on statement:
select distinct on field1 *
from table
On most platforms, however, neither of the above will work because the behav...
How can I pass parameters to a partial view in mvc 4
...ith the model, Razor will implicitly pass your partial the view's ViewData by default, so if you had ViewBag.Id in your view, then you can reference the same thing in your partial.
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“is” operator behaves unexpectedly with integers
...ure common negative placeholders, I think. 0..255 covers arrays of single byte values. It’s 256 that’s mysterious, but I guess it’s for (dis)assembling integers into/from bytes.
– Davis Herring
Jan 27 '18 at 1:56
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Adding a public key to ~/.ssh/authorized_keys does not log me in automatically
... The restorecon is what you need after you have copied the files by hand, e.g. to a new hard drive. (You should probably run it on all files in this case. Could fix other odd problems.)
– ospalh
Sep 24 '15 at 7:58
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Submitting HTML form using Jquery AJAX
... imageUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454...
Get names of all keys in the collection
...e question asks, and can be configured with limits, depth etc. Recommended by any who follows.
– Paul Biggar
Jun 10 '12 at 20:35
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