I have two models, one is Auction, the other is Bid.
An Auction has many Bids. they are associated by foreign key auction_id in Bid
Now, I want to find the max value of the Bid's price for each Auction.
$dataProvider = new CActiveDataProvider('Auction', array('criteria' => array(
'with' => array(
'bids' => array(
'alias'=>'b',
'group' => 'auction_id',
'select' => 'max(b.price) as maxprice'
)
)
)
)
);
And I have defined a maxprice property in Auction's model class.
However, if I try to retrieve the maxprice property, it returns NULL.
To be more specific, I render the $dataprovider to a view page, it fails to get the maxprice property.
PS:
I executed the query in mysql, the query result turns out to be correct.
So, there must be something wrong with the Yii code
SQL code:
SELECT `t`.`id` , max(b.price) as maxprice
FROM `auction` `t`
LEFT OUTER JOIN `bid` `b` ON (`b`.`auction_id`=`t`.`id`) GROUP BY auction_id
Put the value you want before the relation, like so:
$dataProvider = new CActiveDataProvider('Auction', array('criteria' => array(
'select' => 't.*, max(b.price) as maxprice',
'with' => array(
'bids' => array(
'alias'=>'b',
'group' => 'auction_id',
'together'=>true,
)
You can replace the "t.*" with specific field names if you like.
OR you can simply use the select, join and group attributes on your Auction model and skip the relation altogether.
Related
I made an extbase extension and want to list my appointments ordered first by startDate and for those appointments that are on the same day I want to order them by the last name of the customer.
In my repository I made following working query:
public function findAppointmentsForList($future) {
$curtime = time();
$query = $this->createQuery();
$constraints = array();
if ($future !== NULL) {
$constraints[] = ($future) ?
$query->greaterThanOrEqual('startDate', $curtime) :
$query->lessThan('startDate', $curtime);
}
if ($constraints) {
$query->matching($query->logicalAnd($constraints));
} else {}
$orderings = array(
'startDate' => \TYPO3\CMS\Extbase\Persistence\QueryInterface::ORDER_ASCENDING,
// 'customer.lastName' => \TYPO3\CMS\Extbase\Persistence\QueryInterface::ORDER_ASCENDING
);
$query->setOrderings($orderings);
return $query->execute();
}
It returns me some appointments so I assume it's working.
If I then uncomment the line 'customer.lastName... it returns 0 appointments.
What's going on? It's just the ordering, it can't possibly make the query smaller...
I don't even get any errors - I tried it with an invalid property for example and it gave me an error, so the property name is correct too.
And I debugged the working query and the last names in those customer objects where there.
This is my appointment model entry:
/**
* customer
*
* #var \vendor\extension\Domain\Model\Customer
*/
protected $customer = NULL;
And this is the TCA corresponding to it:
'customer' => array(
'exclude' => 1,
'label' => 'LLL:EXT:extension/Resources/Private/Language/locallang_db.xlf:tx_extension_domain_model_appointment.customer',
'config' => array(
'type' => 'select',
'foreign_table' => 'fe_users',
'minitems' => 0,
'maxitems' => 1,
),
),
EDIT: It's working now...but unfortunately I don't know why, changed too much in the meantime which I thought had nothing to do with this. One thing that might've affected this: startDate is of type Date and I noticed the query didn't filter it right so after I changed the curtime to new \DateTime('midnight') it was filtering correctly.
When you use related models in a query as part of the matching or orderBy then the query will be build with joins to the related tables. That means, that the result is actually smaller and will not include appointments without customers.
The strange thing is that you see the last names when you debug it, otherwise i would assume that you have some configuration errors in the TCA. Can you provide the TCA code from the apointment table and may be its model?
My question is about creating collection of entities. I know about "How To Embed Collection Forms" and successfully used it. But in this case I have:
Simple class
class Thing
{
/**
* #ORM\ManyToMany(targetEntity="DicStyle", mappedBy="things")
* ....
*/
protected $styles;
public function __construct()
{
$this->styles = new ArrayCollection();
}
}
Dictionary of styles
class DicStyle
{
.....
}
I don't need to create form for DicStyle objects, because this is read only objects = dictionary (unchangeable). So, I want to create a form with something like this:
$builder->add('styles', 'collection', array(
'type' => 'entity', 'options' => array(
'class' => 'MyEntityBundle:DicStyle'
)
))
Of course it's pseudo-code. I can not imagine how to implement it.
The result
Suppose, I have:
Table "Thing" with one row (id = 1).
Table "DicStyle" with 6 rows (id = from 1 to 6).
Table "mtm_thing_dicstyle" (many-to-many table)
In the form, I choose two DicStyle (id=3, id=5) for the Thing. So, the mtm_thing_dicstyle contains:
thing_id dicstyle_id
-------- ------------
1 3
1 5
Try this form:
$builder->add('styles', 'entity', array(
'class' => 'MyEntityBundle:DicStyle'
'property'=>'name' //what property do you want to see when you select,
'multiple" => true //you'll be able to select many DicStyle
'expanded' => false //it'll shown on a multiple choice select tag
)
);
To select one or more objects in a form to relate them to your result you can use the form field type "entity". (See form-types)
$builder->add('styles', 'entity', array(
'class' => 'MyEntityBundle:DicStyle',
'property' => 'name', // property you want to be displayed
'expanded' => true,
'multiple' => true
)
);
This would render checkboxes and therefore the possibility to select multiple entities to be referenced.
Keep in mind, if you use multiple => true there are two options:
expanded => false: renders a multiselect field
expanded => true: renders checkboxes
See form-entity-type-options
After spending few hours to find a solution for the following issue I´m hoping you can help me.
I have two tables:
Event hasmany Appointments and Appointment belongsto Event
Now I perform in my EventsController:
$this->Event->find('all')
Now I want to order the Events by Appointments. So that the Event with the earliest Appointment is first in the array and so on. I´ve tried many ways, with Containable, Joins, Grouping, Subselects but nothing works.
To perform the find('all') on $this->Event->Appointment is not a solution due to the fact that I want every Event just ones.
Edit #1:
My only solution so far was
$events = $this->Event->find('all', array(
'joins' => array(
array(
'table' => '(SELECT event_id, MIN(start) start FROM appointments GROUP BY event_id)',
'alias' => 'Appointment',
'type' => 'LEFT',
'conditions' => array(
'Event.id = Appointment.event_id'
)
)
),
'order' => array(
'Appointment.start ASC'
)
));
But this is not the best solution!
An option is to create a virtual field representing the earliest appointment date that you can sort by
Put this in your Event model:
function __construct($id = false, $table = null, $ds = null) {
$this->virtualFields['firstappt'] = 'SELECT MIN(Appointment.created) FROM appointments AS Appointment WHERE Appointment.event_id = Event.id';
parent::__construct($id, $table, $ds);
}
You should be able to use this code in your controller:
$this->Event->find('all',array('order' => array('firstappt')));
Hi there I have a table in which combination of three fields is unique. I want to put the check of duplication on this combination. Table looks like
I know how to validate single field, But how to validate the combination is not know. To validate one field I use the following function
public function isValid($data) {
// Options for name field validation
$options = array(
'adapter' => Zend_Db_Table::getDefaultAdapter(),
'table' => 'currencies',
'field' => 'name',
'message'=> ('this currency name already exists in our DB'),
);
// Exclude if a id is given (edit action)
if (isset($data['id'])) {
$options['exclude'] = array('field' => 'id', 'value' => $data['id']);
}
// Validate that name is not already in use
$this->getElement('name')
->addValidator('Db_NoRecordExists', false, $options
);
return parent::isValid($data);
}
Will any body guide me how can I validate duplication on combined fields?
There is no ready to use validator for this, as far as I know. You have either to write your own, or do a check with SQL-query with three conditions (one for each field).
you have to Apply a validation on name element of zend form.
Here is code for add validation on name field.
$name->addValidator(
'Db_NoRecordExists',
true,
array(
'table' => 'currencies',
'field' => 'name',
'messages' => array( "recordFound" => "This Currency Name already exists in our DB") ,
)
);
And you must set required true.
I've got a problem. I'm trying to left join two tables with Zend Framework using $select object. Unfortunatly my tables has common field 'name' and when I'm joining one with the other the results I get is that name field from table overwrites the name field from the other.
My code is something like that:
$select->joinLeft ( array ('users' => 'users' ), $this->_name . '.employee_id = users.user_id', array ('*' ) );
How I can join tables and avoid this issue?
Use table aliases as you would in any normal sql query!
With Zend_Db aliases are written like this:
$select = $db->select()
->from(array('p' => 'products'),
array('product_id', 'product_name'))
->join(array('l' => 'line_items'),
'p.product_id = l.product_id',
array() ); // empty list of columns
The non-zend query would look like this:
SELECT p.product_id, p.product_name
FROM products AS p
JOIN line_items AS l ON p.product_id = l.product_id;
I guess it's bit late but to get all fields from two tables you must alias all the fields
$select = $db->select()
->from(array('u' => 'users'),
array('u.id'=>'u.id','u.employee_id'=>'u.employee_id','u.name'=>'u.name'))
->joinLeft(array('e' => 'employees'),
'e.id = u.employee_id',
array('e.id'=>'e.id','e.name'=>'e.name') );
And your array would look like:
array(
0=>array(
'u.id'=>'1',
'u.employee_id'=>'1',
'u.name'=>'John Doe',
'e.id'=>'1',
'e.name'=>'Worker'
),
1=>array(
...
));