chasse | CiviCRM extension to chassé contacts | Browser Plugin library
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QUESTION
I'm trying to create a trigger on insert in the [user_dance_style] table of the following database.
The [user_dance_style] table has two columns [id_user] and [style_ref]. There are 3 styles available and each id_user can have one to three of the syles.
On insert, I want to check if the id_user has already three styles, if so ROLLBACK
I also want to check if the id_user has already the style to be inserted in that case ROLLBACK.
In clear I just want to be able to make a new insert if the id_user hasn't all 3 styles already and doesn't have the style that I'm trying to insert.
My trigger looks like this:
...ANSWER
Answered 2020-May-22 at 01:28As noted in the comments the inserted pseudo table could have 0-N rows in it, so you cannot assume a single row. And as with all T-SQL you should look for a set based operation before using a procedural one.
The actual error you reported was because even though you called ROLLBACK you didn't RETURN and therefore the trigger continued running and attempted a second ROLLBACK which is what caused your error.
In the set based solution below I am considering all users involved in the update, grouping by them, then using the having clause to exclude any users with 3 or less rows (first test).
And in the second test I am doing the same thing, but now grouping by style_ref as well, and checking for more than 1 row - because at this point in the trigger, the INSERT that fired the trigger has already taken place, so any duplicate row is already in the table, hence why checking for more than one row.
Here is your corrected trigger, using set based logic:
QUESTION
I'm trying to insert a new user into the following database I have created using a stored procedure.
The procedure is the following:
...ANSWER
Answered 2020-May-21 at 10:48The logic here is a bit weird.
The SELECT @id_address = IDENT_CURRENT('address') statement is done after the insert statement. So how do you want the @id_address to be filled when inserting into User ?
With your model, you need to have an address to create user. So you must first create the address then create the user.
QUESTION
For exercise, I have created the following database.
I would like to be able to count() the number of dances in the table "dance" for each user.
This is the query
...ANSWER
Answered 2020-May-17 at 10:01Try the following using union all
QUESTION
ANSWER
Answered 2020-Apr-17 at 17:09Print BASE_DIR to see where it points to. Also '/Projet/main/static' path is treated as an absolute path, not relative. – Ivan Starostin Apr 2 at 20:06
In settings.py, I changed:
QUESTION
I migrated my application to laravel 5.7.When installing the packages in the composer.json i upgraded from "maatwebsite/excel:~2.1.0" to "maatwebsite/excel": "^3.1".So now my export function does not work anymore.I tried to follow the upgrade in https://docs.laravel-excel.com/3.1 but didn't work for me.this is the old code that used to work in the old version:
...ANSWER
Answered 2019-May-28 at 10:42I have recreated your project sample to make this work: Follow steps to implement exactly as I did:
- Install package:
QUESTION
I'm making a website and I would like to have images with different height and width to be centered in the page. There is a script so we only see one image at a time.
I thought about creating a div that occupy the whole page, but then I can't find a way to force the image to be centered inside it.
Some advice? This is what I got for now:
...ANSWER
Answered 2018-Jun-20 at 00:19Normally centering of an image is done like this:
QUESTION
I'm learning How to handle Spark RDD with Python and I don't find solution according to rdd.filter() with where condition.
I have a CSV file which looks like this :
...ANSWER
Answered 2018-Apr-11 at 11:06It's easier and more efficiently implemented using the data frame API (see alternative approach at the bottom).
To get the number of entries where age in row is over 50, you first need to filter. You also need to use the age column (index 6) in your reduce call:
Number of children by city:
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PHP requires the Visual C runtime (CRT). The Microsoft Visual C++ Redistributable for Visual Studio 2019 is suitable for all these PHP versions, see visualstudio.microsoft.com. You MUST download the x86 CRT for PHP x86 builds and the x64 CRT for PHP x64 builds. The CRT installer supports the /quiet and /norestart command-line switches, so you can also script it.
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