CODEWITHSUNDEEP
doctrinedqlself-join
user1828738
user1828738

Reputation: 181

Doctrine2 Self Join, How to join on self without relationship column?

Example mysql query:

SELECT
a1.*
FROM
agreement a1
LEFT JOIN agreement a2 on a1.agreementType = a2.agreementType and a2.id > a1.id
WHERE
a2.id is null

The purpose of the query is to get the last agreement of the type returned. There are many types and I want only a listing of each latest agreement for each type. My example query above works as expected, but no go in DQL.

How would I do this in DQL given I do not have a column that refers to itself? Note that "agreementType" is also a foreign key to a different table as well.

Upvotes: 4

Views: 2873

Answers (1)

user1828738
user1828738

Reputation: 181

Figured it out. Thought I would share.

        SELECT
            a1
        FROM
            My\Model\Agreement a1
            LEFT JOIN My\Model\Agreement a2
                WITH a1.agreementType = a2.agreementType AND a2.id > a1.id
        WHERE
            a2.id IS NULL

Upvotes: 13

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