I would like to create ForEach loop and need advice:
I have "Fetch" Lookup with "Select CustomerName, Country From Customers".
It return rows like "Tesla, USA" and "Nissan, Japan". There are total 10 rows.
I would like to run ForEach loop for 10 times and use CustomerName and Country value in pipeline.
ForEach settings values are current set: #activity('Fetch').output (something wrong here?)
I would like to create new Lookup inside ForEach. I would like in Lookup query "SELECT * FROM Table WHERE CustomerName = 'CustomerName' and Country = 'CountryName'"
Error of ForEach:
The function 'length' expects its parameter to be an array or a string. The provided value is of type 'Object'.
The Items property of the For Each activity should look something like this:
#activity('Fetch').output.value
You can then reference columns from your Lookup within the For Each activity using the item() syntax, eg #item().CustomerName. Remember, expressions in Azure Data Factory (ADF) start with the # symbol but you don't have to repeat it in the string.
Related
This seems like it would be straightforward to do but I just can not figure it out. I have a query that returns an ARRAY of strings in one of the columns. I want that array to only contain unique strings. Here is my query:
SELECT
f."_id",
ARRAY[public.getdomain(f."linkUrl"), public.getdomain(f."sourceUrl")] AS file_domains,
public.getuniqdomains(s."originUrls", s."testUrls") AS source_domains
FROM
files f
LEFT JOIN
sources s
ON
s."_id" = f."sourceId"
Here's an example of a row from my return table
_id
file_domains
source_domains
2574873
{cityofmontclair.org,cityofmontclair.org}
{cityofmontclair.org}
I need file_domains to only contain unique values, IE a 'set' instead of a 'list'. Like this:
_id
file_domains
source_domains
2574873
{cityofmontclair.org}
{cityofmontclair.org}
Use a CASE expression:
CASE WHEN public.getdomain(f."linkUrl") = public.getdomain(f."sourceUrl")
THEN ARRAY[public.getdomain(f."linkUrl")]
ELSE ARRAY[public.getdomain(f."linkUrl"), public.getdomain(f."sourceUrl")]
END
When querying the repository using a criteria, it returns an object with multiple result sets. Each result set is an object mapped to the model. So one can get the preferred result set using ->offsetGet(). How can I get the preferred result set(s) using a parameter value instead?
Example:
A table has three fields uid, guide_option and fact. Table contains multiple records and is mapped to its model. Query fetches data using field guide_option and returns several rows:
$query = $this->createQuery();
$constraints = [$query->equals('guide_option', $guideOption)];
$query->matching($query->logicalAnd($constraints));
$resultsets = $query->execute();
#filter by offset
$offset = $resultsets->offsetGet(0);
#filter by fact
$set = ???
How does one filter by field fact?
I have a dynamic query and need to do a "where" condition that's build dynamically. And if I do this:
$fields = 'onefield, another_field, third_field';
$registros = $registros->where($fields);
It says
SQLSTATE[42S22]: Column not found: 1054 Unknown column 'I
Same thing if I do:
$fields = '`one_column`, `another_column`';
So, how can I pass a list of fields in this where condition, without looping or calling ->where() several times?
Ok it's way simple that i thought:
You must pass dynamic columns as array:
$columns = array('onefield','anotherfield','oopsanotherone');
I'm using Postgres for my db, and I have a column in my Auction model as a jsonb column. I want to create a query that searches the Auction's json column to see whether a user's name OR email exists in any Auction instance's json column.
Right now I have #auctions = Auction.where('invitees #> ?', {current_user.name.downcase => current_user.email.downcase}.to_json), but that only brings back exact key => value matches I want to know whether the name OR the email exists.
You're using the #> operator. The description for it is this:
“Does the left JSON value contain the right JSON path/value entries
at the top level?”
You probably want the ? operator if you want to return a row when the key (name in your case) matches.
There's not a good way to search for values only in a JSON column (see this answer for more details), but you could check if the key exists alone or the key and value match exists.
The same ActiveRecord methods and chaining apply as when using non-JSON columns, namely where and where(…).or(where(…)):
class Auction
def self.by_invitee(user)
name = user.name.downcase
json = { name => user.email } # note: you should be downcasing emails anyways
where('invitee ? :name', name: name).or(
where('invitee #> :json', json: json)
)
end
end
This is just a temporary patch until I add an Invite model, but casting the invitee column to text I can search the columns. Like so
SELECT * FROM auctions
WHERE data::text LIKE "%#{string I'm searching for}%"
So, AR:
Auction.where('data::text LIKE ?', "%#{string I'm searching for}%")
I am currently getting a list of related field like so
List ( join_table::id_b;)'
and what i would like to do is filter that list by a second field in the same related table pseudo code as follows
List ( join_table::id_b;jointable:other="foo")
not really sure how to filter it down
The List() function will return a list of (non-empty) values from all related records.
To get a list filtered by a second field, you could do any one of the following:
Define a calculation field in the join table = If ( other = "foo" ; id_b ) and use this field in your List() function call instead of the id_b field;
Construct a relationship filtered by the other field;
Use the ExecuteSQL() function instead of List();
Write your own recursive custom function (requires the Advanced version to install).