I would like to sort the trainings by their owner, whose name is included in my profile model.
A Training belongs to a Profile.
I have this in my trainings.rb:
column "Owner", :sortable => :profile_name do |training|
if training.profile.nil?
"No associated profile"
else
training.profile.name
end
end
I get this error in production:
Completed 500 Internal Server Error in 19ms
ActionView::Template::Error (PG::UndefinedColumn: ERROR: column "profile_name" does not exist
LINE 1: SELECT "trainings".* FROM "trainings" ORDER BY "profile_na...
^
: SELECT "trainings".* FROM "trainings" ORDER BY "profile_name" desc LIMIT 30 OFFSET 0):
1: insert_tag renderer_for(:index)
You could try the following:
column "Owner", :sortable => 'profile.name' do |training|
Let me know if that works for you!
Related
We are in progress to move our db to Postgres from Orcale.
There is this Oracle query (changed verbiage for privacy concerns):
SELECT * FROM (SELECT somedata.* FROM SNSN.SMS_TXN_SOMEDATA somedata
WHERE ((car= 'tesla' OR car = 'teslaX' OR car = 'teslaY') OR (buyer= 'john' OR buyer = 'rony' OR jim = 'sam'))
AND code = :code
ORDER BY somedata.datetime)
WHERE LIMIT :num
When I hit the endpoint I get this error
ERROR: argument of LIMIT must be type bigint, not type character varying
What would be a suitable/alternative variable to bind this. What can I use instead of variables :code and :num.
I have a model let say Model there is a field which is serialized in Postgresql. There is one more table which is Role and there ids are ::uuid.
I want to fetch one additional field (alias like 'as new_field') which contains the result of the particular operation. When I run it manually with single value then it works fine but when I convert it to dynamically then it through syntax error.
Here is my query with single value:
Model.select("models.role_ids #> '{\"fe8fea09-869c-4a40-ab80-87623be70399\"}'::uuid[] as new_field").first.new_field
# SELECT models.role_ids #> '{"fe8fea09-869c-4a40-ab80-87623be70399"}'::uuid[] as tes FROM "models" ORDER BY "models"."id" ASC LIMIT 1
=> false
It runs the query correctly.
Then I tried it with my array:
1) When placing array's value in query:
Model.select('models.role_ids #> ARRAY[?]::uuid[] as new_field', user.role_ids)
Here user is User object which has HABTM association and 'role_ids' is the mediator table ids. Please let me know if I forgot something to mentioned
Query log:
Model Load (2.2ms) SELECT models.role_ids #> ARRAY[?]::uuid[] as new_field, fe8fea09-869c-4a40-ab80-87623be70399 FROM "models"
PG::SyntaxError: ERROR: syntax error at or near "]"
LINE 1: SELECT models.role_ids #> ARRAY[?]::uuid[] as new...
^
: SELECT models.role_ids #> ARRAY[?]::uuid[] as new_field, fe8fea09-869c-4a40-ab80-87623be70399 FROM "models"
ActiveRecord::StatementInvalid: PG::SyntaxError: ERROR: syntax error at or near "]"
LINE 1: SELECT models.role_ids #> ARRAY[?]::uuid[] as new...
Please let me know if there is any option.
I want to execute the following SQL query :
SELECT date, COUNT(id_customers)
FROM event
WHERE event_id = 3
GROUP BY date
When I try this query in my database, it works perfectly. But in my code I get an error which I can't resolve.
I use symfony2 with the orm pomm. It's Postgresql.
Here is my code :
$sql = "SELECT e.date, COUNT(id_customers) FROM event e WHERE event_id = $* GROUP BY e.date";
return $this->query($sql, [$eventId])->extract();
Here is the error :
request.CRITICAL: Uncaught PHP Exception InvalidArgumentException:
"No such field 'id'. Existing fields are {date, count}"
at /home/vagrant/sourcefiles/vendor/pomm-project/model-manager/sources/lib/Model/FlexibleEntity/FlexibleContainer.php line 64
{"exception":" [object] (InvalidArgumentException(code: 0): No such field 'id'.
Existing fields are {date, count}
at /home/vagrant/sourcefiles/vendor/pomm-project/model-manager/sources/lib/Model/FlexibleEntity/FlexibleContainer.php:64)"} []
So I tried to had the id in my select, by I get this error :
request.CRITICAL: Uncaught PHP Exception
PommProject\Foundation\Exception\SqlException: "
SQL error state '42803' [ERROR] ==== ERROR: column "e.id" must appear in the GROUP BY clause or be used in an aggregate function LINE 1: SELECT e.id, e.date, COUNT(id_customers) FROM event e WHERE ... ^
==== «PREPARE === SELECT e.id, e.date, COUNT(id_customers) FROM event e WHERE event_id = $1 GROUP BY e.date ===»." at /home/vagrant/sourcefiles/vendor/pomm-project/foundation/sources/lib/Session/Connection.php line 327 {"exception":"[object] (PommProject\Foundation\Exception\SqlException(code: 0): \nSQL error state '42803' [ERROR]\n====\nERROR: column \"e.id\" must appear in the GROUP BY clause or be used in an aggregate function\nLINE 1: SELECT e.id, e.date, COUNT(id_customers) FROM event e WHERE ...\n ^\n\n====\n«PREPARE ===\nSELECT e.id, e.date, COUNT(id_customers) FROM event e WHERE event_id = $1 GROUP BY e.date\n ===». at /home/vagrant/sourcefiles/vendor/pomm-project/foundation/sources/lib/Session/Connection.php:327)"} []
The only thing that works is when I had the id in the group by, but this is not the result I want.
Someone can explain me why this is working in the database and not in the php ?
this is because you are fetching flexible entities without their primary key. There is an identity mapper behind the scene that ensure fetching twice the same entity will return the same instance.
In this case, you do not need to fetch entities (hence the extract after the query). So you can just use the QueryManager pooler to return converted arrays like the following:
$sql = "SELECT e.date, COUNT(id_customers) FROM event e WHERE event_id = $* GROUP BY e.date";
// Return an iterator that fetches converted arrays on demand:
return $this
->getSession()
->getQueryManager()
->query($sql, [$eventId])
;
i think its because the alias,
try this
$sql = "SELECT e.date, COUNT(e.id_customers) FROM event e WHERE event_id = $* GROUP BY e.date";
return $this->query($sql, [$eventId])->extract();
This is exactly how GROUP BY works in PostgreSQL:
When GROUP BY is present, it is not valid for the SELECT list
expressions to refer to ungrouped columns except within aggregate
functions, since there would be more than one possible value to return
for an ungrouped column.
It means that each field in your query either must be present in GROUP BY statement or handled by any of the aggregation functions. This is one of the differences between GROUP BY in MySQL and PostreSQL.
In other words you can add id at GROUP BY statement and do not worry about it ;)
I have maybe easy question, but I'm completely stucked.
I have script
SELECT COALESCE(COUNT(id), 0) as MyFiels from table
It works fine and when I have zero value it shows 0.
But I want that instead of 0, I can see one line = "NO RESULTS" for example.
I tried:
SELECT COALESCE(to_char(COUNT(id), 'NO RESULT')) as MyFiels from table
And PostgreSQL shows error message:
ERROR: "E" is not supported
SQL state: 0A000
Where I'm incorrect? Any ideas?
I see what is the error, you are trying to use coalesce to convert 0 to string, and coalesce convert null to something. You need use a CASE
SELECT CASE WHEN COUNT(*) = 0 THEN 'NO RESULT'
ELSE CAST(COUNT(*) as TEXT)
END as field
FROM Table
I am new to SQL and need to query a database to extract certain information before I can import it into another software I am familiar with to analyse the data. This query was sent to me by a friend who I don't have access to at the moment, and I cannot figure out why it gives me the following error:
ERROR: missing FROM-clause entry for table "movies"
LINE 8: FROM (SELECT movies.movieid
Here is the query:
SELECT innerselect.movieid
,innerselect.title
,innerselect.year
,innerselect.imdbid
,innerselect.budget[1] AS budget_currency
,TO_NUMBER(innerselect.budget[2], '999999999999990.00') AS budget_total
,innerselect.businesstext
FROM (SELECT movies.movieid
,movies.title
,movies.year
,movies.imdbid
,business.businesstext
,regexp_matches(business.businesstext, '^BT:[ ](USD)[ ](-?(?!0)(?:\d+|\d{1,3}(?:,\d{3})+))', 'g') AS budget -- creates a PostgreSQL Array which contains the content matched with the RegEx Groups FROM movies LEFT JOIN business ON movies.movieid=business.movieid WHERE movies.movieid > 2753500
) AS innerselect
Any help would be greatly appreciated.
Problem is you put the FROM on the same line as the comment, so the FROM clause was ignored.
SELECT innerselect.movieid
,innerselect.title
,innerselect.year
,innerselect.imdbid
,innerselect.budget[1] AS budget_currency
,TO_NUMBER(innerselect.budget[2], '999999999999990.00') AS budget_total
,innerselect.businesstext
FROM (SELECT movies.movieid
,movies.title
,movies.year
,movies.imdbid
,business.businesstext
,regexp_matches(business.businesstext, '^BT:[ ](USD)[ ](-?(?!0)(?:\d+|\d{1,3}(?:,\d{3})+))', 'g') AS budget -- creates a PostgreSQL Array which contains the content matched with the RegEx Groups
FROM movies LEFT JOIN business ON movies.movieid=business.movieid WHERE movies.movieid > 2753500
) AS innerselect