I'm new to Doctrine but somewhat familiar with SQL. I have a very simple schema with Users and Challenges. Each Challenge has a "challenger id" and a "opponent id" which are foreign keys into the User table. I want to print a list of all challenges, with the output being the names from the User table. Here is my Doctrine query;
$q = Doctrine_Query::create()
->select('u1.name challenger, u2.name opponent')
->from('Challenge c')
->leftJoin('c.Challenger u1')
->leftJoin('c.Opponent u2');
The problem is that this only returns one row. I've used the getSqlQuery() command to look at the generated SQL which ends up being:
SELECT u.name AS u__0, u2.name AS u2__1 FROM challenge c
LEFT JOIN user u ON c.challenger_id = u.id
LEFT JOIN user u2 ON c.opponent_id = u2.id
When run in a 3rd party SQL client this query retrieves all of the rows as expected. Any idea how I can get all of the rows from Doctrine? I'm using $q->execute() which I understand should work for multiple rows.
Thanks.
For me it worked by chaning the hydration mode:
$result = $query->execute(array(), Doctrine_Core::HYDRATE_SCALAR);
Set result set then returns an array instead of objects.
I just ran into this issue and in my case the problem was that my query didn't select any field from the FROM table. Example:
$query = Doctrine_Query::create()
->select(
'ghl.id as id,
ghl.patbase_id as patbase_id,
ghl.publication_no as publication_no,
ghl.priority_no as priority_no
'
)
->from('GridHitListContents ghlc')
->leftJoin('ghlc.GridHitList ghl')
As you can see there is no selected field from the GridHitListContents table.
with a $query->count() I got 2000ish results, but with $query->fetchArray() only the first one.
When I added
$query = Doctrine_Query::create()
->select(
'ghlc.id,
ghl.id as id,
...
'
)
->from('GridHitListContents ghlc')
->leftJoin('ghlc.GridHitList ghl')
I got back all my results.
$query->fetchOne() work fine for me.
Use this $result = $q->execute(array(), Doctrine_Core::HYDRATE_ARRAY)
Related
I have the following relation:
I have a many-to-many relation between Course and Users, and then again a has-many relation between Users and Certificates.
Now here is way how to get all users from one course, who have a certificate in the same course:
$user = $course->users()
->whereHas('certificates', function ($query) use($course){
$query->where('course_certificates.course_id', '=', $course->id);
})->first();
This will return a user with certificates $user->certificates.
This is the query.
SELECT *
FROM "course_users"
WHERE "course_users"."course_id" = ? AND
"course_users"."course_id" IS NOT NULL AND
EXISTS (
SELECT *
FROM "course_certificates"
WHERE "course_users"."id" = "course_certificates"."user_id" AND
"course_certificates"."course_id" = ?
)
If I use a join instead:
$user = $course->users()
->join('course_certificates', 'course_certificates.user_id', '=', 'course_users.id')
->where('course_certificates.course_id', '=', $course->id)
->first();
Then I get the same user, however the relationship $user->certificates is empty?
SELECT *
FROM "course_users"
INNER JOIN "course_certificates"
ON "course_certificates"."user_id" = "course_users"."id"
WHERE "course_users"."course_id" = ? AND
"course_users"."course_id" IS NOT NULL AND
"course_certificates"."course_id" = ?
Why is that?
I am not 100% sure, but if you use join I think laravel do not understand whatever table you are joining it with that it is a relation, it is just a join, it could mean anything, but the first query you are telling it what the relation means (whereHas some data for X relation).
Looking at the source code, I can confirm what I am saying: join and whereHas (and has).
getRelated() does the magic (adds the data to your relation). See that join does not do anything of this, it literally joins queries, nothing else related to relations. Also join comes from Query/Builder and any other method about relations comes from Eloquent/Builder.
No errors, just an empty result. I am trying to work out why this query within a model is showing an empty collection.
Mysql Workbench query:
select
u.`name`, u.email, ual.admin, a.account_name
from
users as u
join users_account_link as ual on u.id = ual.user_id and u.account_id_in_use = ual.account_id
join accounts a on ual.account_id = a.id
where
u.sub = 'ABCDE';
Spits one row containing the desired result set.
Recreating this in Laravel query builder:
$settings = DB::table('users as u')
->join('users_account_link as ual', function ($join) {
$join->on('u.id', '=', 'ual.user_id')
->where('u.account_id_in_use', '=', 'ual.account_id');
})
->join('accounts as a', 'ual.account_id', '=', 'a.id')
->select('u.name as user_name', 'u.email as user_email', 'ual.admin as admin_check', 'a.account_name')
->where('u.sub',auth()->user()->sub)
->get();
dd($settings);
Provides an empty collection. I have done many custom queries which work well however the problem I have narrowed down the result set is the additional condition for join users_account_link as ual on u.id = ual.user_id and u.account_id_in_use = ual.account_id and have tried to move this condition to a where clause which still provides an empty result.
'u.account_id_in_use', '=', 'ual.account_id' are both integers however replacing u.account_id_in_use with a hardcoded integer e.g. 2 would return a result. Therefore, Laravel seems to have an issue with this field and replaced the where-> with a whereRaw now returns the desired result.
For anyone having a similar issue, try replacing fields with hardcode values to isolate the issue and look into using raw when possible to overcome the issue.
Hope this helps anyone in need.
In a symfony 2 application, I have 2 entities mapped by a oneToMany relation (user and rendezvous).
I'm trying to search into my user entity and join the last rendezvous for each user found.
The idea is something like that :
$qb = $this->createQueryBuilder('p');
$qb->select('p.id, p.last_name, p.first_name')
->leftJoin('p.rendezvous', 'i')
->select('i.date')
->where('i.user = p.user')
->orderBy('i.date', 'DESC')
->setFirstResult(0)
->setMaxResults(1)
->where('p.user IN ('.$users.')')
->orderBy('p.last_name', 'ASC')
->addOrderBy('p.first_name', 'ASC');
I should have results like :
1, Ben, Tooch, 2014-10-15 18:45:00
7, John, Snow, 2014-10-16 17:15:00
...
I tried to use the paginator function but without any success.
Thank you very much for your help.
As I add some more columns to get, I had to find another way to do it. I finally got a working DQL query :
$qb->select('p.id, p.last_name, p.first_name, r.date, r.othercolumn')
->leftJoin('p.rendezvous', 'r', 'WITH', 'p.id = r.user AND r.date = (SELECT MAX(r2.date) FROM \App\YourBundle\Entity\Rendezvous as r2 WHERE r2.user = p.id)')
->where('p.user IN ('.$users.')')
->orderBy('p.last_name', 'ASC')
->addOrderBy('p.first_name', 'ASC')
->groupBy('p.id');
try groupBy the entity you want to setMaxResults on.
Have you tried outputing the generated SQL and running it?
I'm not sure if you can use maxresults and firstResult in a left join like this, but if your idea is just to recover users and their last rendezvous, you could use max(i.date) and group by p.id, p.last_name, p.first_name.
But if you want to page it, simply join the two tables and order by i.date.
Hope it helps!
I need to perform this query:
SELECT * FROM (SELECT * FROM product WHERE car = 'large' ORDER BY onSale DESC) AS product_ordered GROUP BY type
In Symfony2 using the entity manager.
My basic query builder would be :
$query = $em->getRepository('AutomotiveBundle:Car')
->createQueryBuilder('p')
->where('pr.car = ?1')
->andWhere('pr.status = 1')
->orderBy('pr.onSale', 'DESC')
->setParameter(1, $product->getName())
->groupBy('p.type')
->getQuery();
But I cannot work out how to add in a subquery to this.
Ive tried making a separate query and joining it like:
->andWhere($query->expr()->in('pr.car = ?1',$query2->getQuery()));
But I get:
Call to undefined method Doctrine\ORM\Query::expr()
One trick is to build two queries and then use getDQL() to feed the first query into the second query.
For example, this query returns a distinct list of game ids:
$qbGameId = $em->createQueryBuilder();
$qbGameId->addSelect('distinct gameGameId.id');
$qbGameId->from('ZaysoCoreBundle:Event','gameGameId');
$qbGameId->leftJoin('gameGameId.teams','gameTeamGameId');
if ($date1) $qbGameId->andWhere($qbGameId->expr()->gte('gameGameId.date',$date1));
if ($date2) $qbGameId->andWhere($qbGameId->expr()->lte('gameGameId.date',$date2));
Now use the dql to get additional information about the games themselves:
$qbGames = $em->createQueryBuilder();
$qbGames->addSelect('game');
$qbGames->addSelect('gameTeam');
$qbGames->addSelect('team');
$qbGames->addSelect('field');
$qbGames->addSelect('gamePerson');
$qbGames->addSelect('person');
$qbGames->from('ZaysoCoreBundle:Event','game');
$qbGames->leftJoin('game.teams', 'gameTeam');
$qbGames->leftJoin('game.persons', 'gamePerson');
$qbGames->leftJoin('game.field', 'field');
$qbGames->leftJoin('gameTeam.team', 'team');
$qbGames->leftJoin('gamePerson.person', 'person');
// Here is where we feed in the dql
$qbGames->andWhere($qbGames->expr()->in('game.id',$qbGameId->getDQL()));
Kind of a long example but i didn't want to edit out stuff and maybe break it.
You can use DBAL for performing any sql query.
$conn = $this->get('database_connection');//create a connection with your DB
$sql="SELECT * FROM (SELECT * FROM product WHERE car =? ORDER BY onSale DESC) AS product_ordered GROUP BY type"; //Your sql Query
$stmt = $conn->prepare($sql); // Prepare your sql
$stmt->bindValue(1, 'large'); // bind your values ,if you have to bind another value, you need to write $stmt->bindValue(2, 'anothervalue'); but your order is important so on..
$stmt->execute(); //execute your sql
$result=$stmt->fetchAll(); // fetch your result
happy coding
How can I select rows from two or more tables?
I'm setting default fields for a form, and I need values from two tables...
My current code reads:
$this->CI->db->select('*');
$this->CI->db->from('user_profiles');
$this->CI->db->where('user_id' , $id);
$user = $this->CI->db->get();
$user = $user->row_array();
$this->CI->validation->set_default_value($user);
The example in the User Guide should explain this:
$this->db->select('*'); // <-- There is never any reason to write this line!
$this->db->from('blogs');
$this->db->join('comments', 'comments.id = blogs.id');
$query = $this->db->get();
// Produces:
// SELECT * FROM blogs
// JOIN comments ON comments.id = blogs.id
See the whole thing under Active Record page in the User Guide.
Just add the other table to the "->from()" method. Something like:
$this->db->select('t1.field, t2.field2')
->from('table1 AS t1, table2 AS t2')
->where('t1.id = t2.table1_id')
->where('t1.user_id', $user_id);
I think the question was not so much about joins as how to display values from two different tables - the User Guide doesn't seem to explain this.
Here's my take:
$this->db->select('u.*, c.company, r.description');
$this->db->from('users u, company c, roles r');
$this->db->where('c.id = u.id_company');
$this->db->where('r.permissions = u.permissions');
$query = $this->db->get();
I think the syntax is incorrect.
You need to select one record. I have two tables, and I have an id from one table transfer by parameter, and the relation of both tables.
Try this
$this->db->select('*')
->from('student')
->where('student.roll_no',$id)
->join('student_details','student_details.roll_no = student.roll_no')
->join('course_details','course_details.roll_no = student.roll_no');
$query = $this->db->get();
return $query->row_array();
$SqlInfo="select a.name, b.data fromtable1 a, table2 b where a.id=b.a_id";
$query = $this->db->query($SqlInfo);
try this way, you can add a third table named as c and add an 'and' command to the sql command.
// Select From Table 1 All Fields, and From Table 2 one Field or more ....
$this->db->select('table1.*, table2.name');
$this->db->from('table1, table2');
$this->db->where('table2.category_id = table1.id');
$this->db->where('table2.lang_id',$id); // your where with variable
$query = $this->db->get();
return $query->result();