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Rails find_or_create_by more than one attribute?
There is a handy dynamic attribute in active-record called find_or_create_by:
5 Answers
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When should I use cross apply over inner join?
... TOP 3 *
FROM t2
WHERE t2.t1_id = t1.id
ORDER BY
t2.rank DESC
) t2o
It cannot be easily formulated with an INNER JOIN condition.
You could probably do something like that using CTE's and window function:
WITH t2o AS
(
SELECT...
Set selected index of an Android RadioGroup
...he answer below if you are, in fact, looking to set the radio button group by index, see the answer below.
((RadioButton)radioGroup.getChildAt(index)).setChecked(true);
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How to delete from select in MySQL?
...posts WHERE id IN (
SELECT * FROM (
SELECT id FROM posts GROUP BY id HAVING ( COUNT(id) > 1 )
) AS p
)
Or use joins as suggested by Mchl.
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How to use GROUP BY to concatenate strings in SQL Server?
...1]','VARCHAR(MAX)')
,1,2,'') AS NameValues
FROM #YourTable Results
GROUP BY ID
DROP TABLE #YourTable
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Select SQL Server database size
...er_files WITH(NOWAIT)
WHERE database_id = DB_ID() -- for current db
GROUP BY database_id
Output:
-- my query
name log_size_mb row_size_mb total_size_mb
-------------- ------------ ------------- -------------
xxxxxxxxxxx 512.00 302.81 814.81
-- sp_spaceused
database_...
An App ID with Identifier '' is not available. Please enter a different string
...
update
As of Xcode 8, iOS Team Provision Profile Managed by Xcode are now updated by Xcode automatically and correctly. They are not even listed at the Developer Portal, but generated on-the-flight.
However, the solution proposed below will still work. I've switched to using the ...
Select last row in MySQL
...here MAX(id) is the right answer! Kind of:
SELECT fields FROM table ORDER BY id DESC LIMIT 1;
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Remove duplicate rows in MySQL
...IKE your_table;
INSERT your_table_deduped
SELECT *
FROM your_table
GROUP BY index1_id,
index2_id;
RENAME TABLE your_table TO your_table_with_dupes;
RENAME TABLE your_table_deduped TO your_table;
#OPTIONAL
ALTER TABLE `your_table` ADD UNIQUE `unique_index` (`index1_id`, `index2_id`);
#...
find vs find_by vs where
... suits your needs best.
The find method is usually used to retrieve a row by ID:
Model.find(1)
It's worth noting that find will throw an exception if the item is not found by the attribute that you supply. Use where (as described below, which will return an empty array if the attribute is not f...