I am making a query inside a form.
The idea is : Now I have a dropdown with all the users, ok?
I have a query like this:
'query_builder' => function(EntityRepository $er) {
return $er->createQueryBuilder('u')->orderBy('u.lastName', 'ASC');
}
This works flawless!
Instead of displaying all the users, I only need the users that are associated with a category. This definition is in the "user_data" table (user_id + category_id).
So, I need to do something like:
SELECT * FROM users
WHERE user_id IN (SELECT user_id FROM user_data WHERE category_id='2')
I don't have any entity that looks like UserData, I only have User.php, but inside this file I found this:
/**
*#ORM\ManyToMany(targetEntity="My\Bundle\Entity\Data", inversedBy="users")
*#ORM\joinTable(name="user_data")
*/
protected $datas;
[...]
So I see that a relationship is build, but I don't get it how to use it in order to build my query based on the 2 tables...
Anyone can help me with this issue? :)
Thanks!
Try this,
'query_builder' => function(EntityRepository $er) {
return $er->createQueryBuilder('u')
->innerJoin('u.datas', 'd')
->where('d.category = :category') // Check your Data entity to get the right field name
->setParameter('category', $yourCategoryId) // you could use options here
->orderBy('u.lastName', 'ASC');
}
Also, update your question with all your entities (Data, ...)
Related
I have tables in my database, that are not managed by Symfony; there are no entities for these tables. They are tables from another application, I import them and use Symfony to generate statistics from the data in the tables.
How do I access this?
Can i use doctrine and a regular repository for this?
I just want to read data, not update.
Right now I'm using straight mysqli_connect and mysqli_query, but that just doesn't feel right using Symfony 5.
You should just be able to query with sql. The following example comes straight from the docs:
// src/Repository/ProductRepository.php
// ...
class ProductRepository extends ServiceEntityRepository
{
public function findAllGreaterThanPrice(int $price): array
{
$conn = $this->getEntityManager()->getConnection();
$sql = '
SELECT * FROM product p
WHERE p.price > :price
ORDER BY p.price ASC
';
$stmt = $conn->prepare($sql);
$stmt->execute(['price' => $price]);
// returns an array of arrays (i.e. a raw data set)
return $stmt->fetchAllAssociative();
}
}
https://symfony.com/doc/current/doctrine.html#querying-with-sql
I use a union to join two datasets and then the following query to setup for pagination correctly
$paginationQuery = $this->find('all')
->contain(['EmailAddresses' => [
'foreignKey' => false,
'queryBuilder' => function($q) {
return $q->where(['Members__id' => 'EmailAddresses.member_id']);
}
]])
->select( $selectMainUnion )
->from([$this->getAlias() => $query])
->order(['Members__last_name' => 'ASC', 'Members__first_name' => 'ASC']);
I have also tried
$paginationQuery = $this->find('all')
->contain(['EmailAddresses'])
->select( $selectMainUnion )
->from([$this->getAlias() => $query])
->order(['Members__last_name' => 'ASC', 'Members__first_name' => 'ASC']);
and tried
$query->loadInto($query, ['EmailAddresses']); where $query is the result of the union.
Neither of these result in email addresses added to $paginationQuery.
Is there a way to do this?
Adding to clarify the code
$selectMain =['Members.id',
'Members.member_type',
'Members.first_name',
'Members.middle_name',
'Members.last_name',
'Members.suffix',
'Members.date_joined'];
foreach($selectMain as $select) {
$selectMainUnion[] = str_replace('.', '__', $select);
}
$this->hasMany('EmailAddresses', [
'foreignKey' => 'member_id',
'dependent' => true,
]);
Looking at the SQL in DebugKit SQL Log, there is no reference to the EmailAddresses table.
Generally containments do work fine irrespective of the queries FROM clause, whether that's a table or a subquery should be irrelevant. The requirement for this to work however is that the required primary and/or foreign key fields are being selected, and that they are in the correct format.
By default CakePHP's ORM queries automatically alias selected fields, ie they are being selected like Alias.field AS Alias__field. So when Alias is a subquery, then Alias.field doesn't exist, you'd have to select Alias.Alias__field instead. So with the automatic aliases, your select of Members__id would be transformed to Members.Members__id AS Members__Members__id, and Members__Members__id is not something the ORM understands, it would end up as Members__id in your entities, where the eager loader would expect id instead, ie the name of the primary key which is used to inject the results of the queried hasMany associated records (this happens in a separate query), your custom queryBuilder won't help with that, as the injecting happens afterwards on PHP level.
Long story short, to fix the problem, you can either change how the fields of the union queries are selected, ie ensure that they are not selected with aliases, that way the pagination query fields do not need to be changed at all:
$fields = $table->getSchema()->columns();
$fields = array_combine($fields, $fields);
$query->select($fields);
This will create a list of fields in the format of ['id' => 'id', ...], looks a bit whacky, but it works (as long as there's no ambiguity because of joined tables for example), the SQL would be like id AS id, so your pagination query can then simply reference the fields like Members.id.
Another way would be to select the aliases of the subquery, ie not just select Member__id, which the ORM turns into Member__Member__id when it applies automatic aliasing, but use Members.Member__id, like:
[
'Member__id' => 'Members.Member__id',
// ...
]
That way no automatic aliasing takes place, on SQL level it would select the field like Members.Member__id AS Member__id, and the field would end up as id in your entities, which the eager loader would find and could use for injecting the associated records.
I'm trying to achieve a query similar to this:
SELECT r.*, (SELECT COUNT(UserID) FROM RoleUsers ru WHERE ru.RoleId = r.Id) AS Assignments
FROM Roles r
To retrieve the number of the users per each role.
The simplest and the most straightforward option to implement desired output:
this.DbContext.Set<Role>().Include(x => x.RoleUser)
.Select(x => new { x, Assignments = x.RoleUsers.Count() });
Retrieves all the roles, and then N queries to retrieve count:
SELECT COUNT(*)
FROM [dbo].[RoleUsers] AS [r0]
WHERE #_outer_Id = [r0].[RoleId]
Which is not an option at all. I tried also to use GroupJoin, but it loads all the required data set in one query and performs grouping in memory:
this.DbContext.Set<Role>().GroupJoin(this.DbContext.Set<RoleUser>(), role => role.Id,
roleUser => roleUser.RoleId, (role, roleUser) => new
{
Role = role,
Assignments = roleUser.Count()
});
Generated query:
SELECT [role].[Id], [role].[CustomerId], [role].[CreateDate], [role].[Description], [role].[Mask], [role].[ModifyDate], [role].[Name], [assignment].[UserId], [assignment].[CustomerId], [assignment].[RoleId]
FROM [dbo].[Roles] AS [role]
LEFT JOIN [dbo].[RoleUser] AS [assignment] ON [role].[Id] = [assignment].[RoleId]
ORDER BY [role].[Id]
Also, I was looking into a way, to use windowing functions, where I can just split count by partition and use distinct roles, but I have no idea how to wire up windowing function in EF:
SELECT DISTINCT r.*, COUNT(ra.UserID) OVER(PARTITION BY ru.RoleId)
FROM RoleUsers ru
RIGHT JOIN Roles r ON r.Id = ru.RoleId
So, is there any way to avoid EntitySQL?
Currently there is a defect in EF Core query aggregate translation to SQL when the query projection contains a whole entity, like
.Select(role => new { Role = role, ...}
The only workaround I'm aware of is to project to new entity (at least this is supported by EF Core) like
var query = this.DbContext.Set<Role>()
.Select(role => new
{
Role = new Role { Id = role.Id, Name = role.Name, /* all other Role properies */ },
Assignments = role.RoleUsers.Count()
});
This translates to single SQL query. The drawback is that you have to manually project all entity properties.
this.DbContext.Set<Role>()
.Select(x => new { x, Assignments = x.RoleUsers.Count() });
you dont need to add include for RoleUser since you are using Select statement. Furhtermore, I guess that you are using LazyLoading where this is expected behavior. If you use eager loading the result of your LINQ will run in one query.
you can use context.Configuration.LazyLoadingEnabled = false; before your LINQ query to disable lazy loading specifically for this operation
I have a table in which comma seprated id of another table i want to use the following query in cakephp in proper form with find function
"select * from special_offers where find_in_set('".$storeId."', stores) and user_id = '". $userId ."'";
Use like this
$data = $this->SpecialOffer->find('all',array('conditions' => array('SpecialOffer.user_id' => $userId ,'FIND_IN_SET(\''. $storeId .'\',SpecialOffer.stores1)')));
Hope this may help you
I have a Post model which hasMany PostField
every post can have several fields stored in the post_fields table..
post_fields has this structure: (id, post_id, name, value)
posts table has some common fields for all posts, but any additional fields should be stored in post_fields table..
I created a search form that is used to filter the posts
when specifying filters for the fields in the posts table, it works fine..
but I want to make the filter to work even on the other fields found in post_fields ..
I can retrieve the posts first then filter them manually, but i want something more efficient !
EXAMPLE: let's suppose that posts are describing some products..
post (id, title, created, price)
post_fields (id, post_id, name, value)
in this case, all posts have title, created and price..
but if a post (id=3) wants to have a weight field, we should do that by creating a record in post_fields, the record should be :
{ id: .. , post_id: 3, name: weight, value: .. }
it's easy now to filter posts according to price (e.g. price between min & max)..
but, what if i want to filter posts according to weight ??
e.g. i want all posts that have weight greater than 10 !!
I would like to achieve this preferably in one query, using joins maybe or subqueries ..
I don't know how to do that in cakePHP, so if any one has an idea, plz HELP !!
even if someone just has an idea but doesn't have details, that could help ...
thanx in advance !
There is no way to search against the children of a hasMany relationship. You will need to run your query against the PostFields model. ie: $this->PostField->find('all', array('conditions'=>array('PostField.name' => 'weight', 'PostField.value' > 10)));
If you want to do a query against both the PostField and Post models at the same time (ie: price < $1.00 and weight > 10, you will need to do a custom query, as CakePHP has no built-in solution for doing so TMK. Should look something like this:
$query = "SELECT ... FROM posts as Post, post_fields as PostField WHERE PostField.name = 'weight' AND PostField.value > 10 AND POST.price < 1.0 AND PostField.post_id = Post.id;"
$posts = $this->Post->query($query);
EDIT:
I would do this. You're not going to get away with doing a single call, but this is still a clean solution.
$postIds = null;
if(/*we need to run query against PostFields*/) {
$conditions = array(
'OR' => array(
array(
'AND' => array(
'PostField.name' => 'weight',
'PostField.value' > 10
)
),
array(
'AND' => array(
'PostField.name' => 'height',
'PostField.value' < 10
)
)
)
);
$fields = array('PostField.id', 'PostField.post_id');
$postIds = $this->Post->PostField->find('list', array('conditions'=>$conditions, 'fields'=>$fields));
}
$conditions = array('Post.price' < 1.0);
if($postIds) {
$conditions['Post.id'] = $postIds;
}
$posts = $this->Post->find('all', array('conditions'=>$conditions));
You should look into using the Containable behavior for your models. This way, you can filter the returned columns as you like. (I think this is the type of filtering you want to do)