retrieving object information with Doctrine - sql

i want to fetch information from the database using objects.
i really like this approach cause this is more OOP:
$user = Doctrine_Core::getTable('User')->find(1);
echo $user->Email['address'];
echo $user->Phonenumbers[0]->phonenumber;
rather than:
$q = Doctrine_Query::create()
->from('User u')
->leftJoin('u.Email e')
->leftJoin('u.Phonenumbers p')
->where('u.id = ?', 1);
$user = $q->fetchOne();
echo $user->Email['address'];
echo $user->Phonenumbers[0]['phonenumber'];
the problem is that the first one uses 3 queries (3 different tables), while the second one uses only 1 (and is therefore recommended technique).
but i feel that it destroys the object oriented design. cause ORM is meant to give us an OOP approach so that we could focus on objects and not the relational database. but now they want us to go back to use SQL like pattern.
there isn't a way to get information form multiple tables not using DQL?
the above examples are taken from the documentation:
doctrine

Create a custom method in your Table class that will return proper data:
class UserTable extends Doctrine_Table {
public function retrieveOne($id) {
return $this->createQuery('u')
->leftJoin('u.Email')
->leftJouin('u.Phonenumbers p')
->where('u.id = ?', $id)
->fetchOne();
}
}
Your final code:
$user = Doctrine::getTable('User')->retrieveOne(1);
echo $user['Phonenumbers'][0]['phonenumber'];

Related

what is the difference with these query classes in TYPO3?

I'm using extbase in my extension and so I have *Repository classes where I can do simple queries just like:
public function getRecordsByCondition($config = [],$recordPages = null) {
$recordQuery = $this->createQuery();
$constraints = [];
if ($config['field1']) {
$constraints[] = $recordQuery->equals('field1',$config['field1']));
}
if ($config['field2']) {
$constraints[] = $recordQuery->equals('field2',$config['field2']));
}
if ($config['field3']) {
$constraints[] = $recordQuery->equals('field3',$config['field3']));
}
if (count($constraints)) {
if ($recordPages) {
$constraints[] = $recordQuery->in('pid',$recordPages);
$recordQuery->getQuerySettings()->setRespectStoragePage(false);
}
$recordQuery->matching($recordQuery->logicalAnd($constraints));
} else {
return false;
}
return $recordQuery->execute();
}
this will respect enableFields and other usual conditions.
on the other hand there is the option to do it in this way:
public function getrecords2($config,$recordPages) {
$queryBuilder = GeneralUtility::makeInstance(ConnectionPool::class)
->getQueryBuilderForTable('tx_myext_domain_model_records');
$rawquery = $queryBuilder
->select('*')
->from('tx_myext_domain_model_records')
->where(
$queryBuilder->expr()->eq('field1',$config['field1']),
$queryBuilder->expr()->eq('field2',$config['field2']),
$queryBuilder->expr()->eq('field3',$config['field3']),
$queryBuilder->expr()->in('pid', $recordPages),
$queryBuilder->expr()->eq('deleted',0),
$queryBuilder->expr()->eq('hidden',0)
// starttime, endtime, language, workspace, ....
);
return $rawquery->execute()->fetchAll();
}
where I need to care about enablefields by myself but have more options to specify the query.
On the first view you can see that there are other methods (eq vs. equals) and these kind of doing queries have no relation. But both work on the same table.
Now I'm at a point where I need to change all my work from first to second variant as I need a query with a join to another table which can't be done with first variant (as far as I know).
Have I missed something or does the first variant needs some enhancements?
Well, I am not sure exactly the difference but let me try to express things in brief as per my knowledge :D
The main difference between both queries is Individual database queries (Typically I call it Extbase query, I'm not sure I am right or not!) and another is Doctrine DBAL Queries
1. Individual database queries
Here, as per the modern approach extension use Domain modeling. So, TYPO3 already enables a secure connection for model (Typically database table) and you can use relational table connection with Extbase function (Select, operational, join etc..) provided by TYPO3 core.
For more: https://docs.typo3.org/m/typo3/book-extbasefluid/master/en-us/6-Persistence/3-implement-individual-database-queries.html
2. Doctrine DBAL
Here, you enable connection manually for the database table using ConnectionPool class. Also, you have more feasibility to establish a relation (or Join you can say!) according to your need.
For more: https://docs.typo3.org/m/typo3/reference-coreapi/master/en-us/ApiOverview/Database/Index.html
However, you can use restriction for taking care if hidden delete etc.
$queryBuilder = GeneralUtility::makeInstance(ConnectionPool::class)
->getQueryBuilderForTable('tx_myext_domain_model_records');
$queryBuilder->getRestrictions()->removeAll()->add(GeneralUtility::makeInstance(DeletedRestriction::class));
$queryBuilder->getRestrictions()->add(GeneralUtility::makeInstance(HiddenRestriction::class));
$rawquery = $queryBuilder
->select('*')
->from('tx_myext_domain_model_records')
->where(
$queryBuilder->expr()->eq('field1',$config['field1']),
$queryBuilder->expr()->eq('field2',$config['field2']),
$queryBuilder->expr()->eq('field3',$config['field3']),
$queryBuilder->expr()->in('pid', $recordPages)
// starttime, endtime, language, workspace, ....
);
See: https://docs.typo3.org/m/typo3/reference-coreapi/master/en-us/ApiOverview/Database/RestrictionBuilder/Index.html
I know this is not a sufficient and 100% correct answer. Everyone can welcome to correct me :)
where I need to care about enablefields by myself
That's not true. By default there are Restrictions active and you can enable or disable every Restriction with a short command.
I use both approaches, but I use the first one only on Extbase extensions, the second one on every other extension. (Yes, there exist extensions without Extbase)

Compare two database fields in extbase repository

I am using TYPO3 8. In my extension I have a database table "company" in which I store for each company the total number of places (number_places) and the number of occupied places (occupied_places).
Now I want to limit the search to companies which have available places left.
In MySQL it would be like this:
SELECT * FROM company WHERE number_places > occupied_places;
How can I create this query in the extbase repository?
I tried to introduce the virtual property placesLeft in my model but it did not work.
I don't want to use a raw SQL statement as mentioned below, because I already have implemented a filter which uses plenty of different constraints.
Extbase query to compare two fields in same table
You can do it like this in your repository class, please note the comments inside the code:
class CompanyRepository extends \TYPO3\CMS\Extbase\Persistence\Repository
{
public function findWithAvailablePlaces(bool $returnRawQueryResult = false)
{
// Create a QueryBuilder instance
$queryBuilder = $this->objectManager->get(\TYPO3\CMS\Core\Database\ConnectionPool::class)
->getConnectionForTable('company')->createQueryBuilder();
// Create the query
$queryBuilder
->select('*')
->from('company')
->where(
// Note: this string concatenation is needed, because TYPO3's
// QueryBuilder always escapes the value in the ExpressionBuilder's
// methods (eq(), lt(), gt(), ...) and thus render it impossible to
// compare against an identifier.
$queryBuilder->quoteIdentifier('number_places')
. \TYPO3\CMS\Core\Database\Query\Expression\ExpressionBuilder::GT
. $queryBuilder->quoteIdentifier('occupied_places')
);
// Execute the query
$result = $queryBuilder->execute()->fetchAll();
// Note: this switch is not needed in fact. I just put it here, if you
// like to get the Company model objects instead of an array.
if ($returnRawQueryResult) {
$dataMapper = $this->objectManager->get(\TYPO3\CMS\Extbase\Persistence\Generic\Mapper\DataMapper::class);
return $dataMapper->map($this->objectType, $result);
}
return $result;
}
}
Notes:
If you have lots of records to deal with, I would - for performance reasons - not use the data mapping feature and work with arrays.
If you want to use the fluid pagination widget, be sure you don't and build your own pagination. Because of the way this works (extbase-internally), you'd get a huge system load overhead when the table grows. Better add the support for limited db queries to the repository method, for example:
class CompanyRepository extends \TYPO3\CMS\Extbase\Persistence\Repository
{
public function findWithAvailablePlaces(
int $limit = 10,
int $offset = 0,
bool $returnRawQueryResult = false
) {
// ...
$queryBuilder
->setMaxResults($limit)
->setFirstResult($offset);
$result = $queryBuilder->execute()->fetchAll();
// ...
}
}
I think you cant do this using the default Extbase Query methods like equals() and so on. You may use the function $query->statement() for your specific queries like this.
You also can use the QueryBuilder since TYPO3 8 which has functions to compare fields to each other:
https://docs.typo3.org/typo3cms/CoreApiReference/latest/ApiOverview/Database/QueryBuilder/Index.html#quoteidentifier-and-quoteidentifiers
It's fine to use this QueryBuilder inside Extbase repositories. After this you can use the DataMapper to map the query results to Extbase models.
In case of using "statement()" be aware of escaping every value which may cause any kind of SQL injections.
Based on the current architecture of TYPO3, the data structure is such that comparing of two tables or, mixing results from two tables ought to be done from within the controller, by injecting the two repositories. Optionally, you can construct a Domain Service that can work on the data from the two repositories from within the action itself, in the case of a routine. The service will also have to be injected.
Note:
If you have a foreign relation defined in your table configuration, the results of that foreign relation will show in your defined table repository. So, there's that too.

executing a sql code for creating a table and database in zend framework

I wrote a sql script and in it I created a table ;
Now I need to know ,how I can execute this script? (with which codes?)
And I have another question : where? where I must write this codes?(which folder in zend project?)
if it is possible for you please explain with an example.thanks
Creating tables in the database
Zend Framework is not supposed to be the one creating the tables, thus, my suggestion is to run those scripts in other environment.
The fastest one is, probably, the very own SQL shell, but you can use another software such as MySQLWorkbench if you are using MySQL.
Once the tables are created, the access to the tables is made this way:
Introduction
When you are using Zend Framework, you are making use of the MVC pattern. I suggest you to read what is that: Wikipedia MVC
If you read the Wikipedia link, you probably know now that the acess to the database is going to be made by the model.
Thus, if you followed the recommended project structure that Zend provides you will have a models folder under your application folder. There, you are supposed to implement the classes that will make access to the DB.
But well... you now know where to locate those classes but you will ask me: how? It's easy if you know where to search. ZF provides an abstract class called Zend_Db_Table_Abstract that has all the methods that will make your life easier talking about interaction with your database's tables. This is the class that your classes should implement.
Example
Let's suppose you've got a page in your website in which you want to show to the user a list of products of your local store. You have a table in your database called "products" in which you have all the useful information such us name, price and availability.
You will have a controller with an action called indexAction() or listAction() this action is prepared to send the data to your view and will look like:
class Store_ProductsController extends Zend_Controller_Action {
public function indexAction(){
//TODO: Get data from the DataBase into $products variable
$this->view->products = $products;
}
}
And your view file will that that products variable and do sutff with it.
But now comes the magic, you will have a class that will access to the database as I've said, it'll be like:
class Model_Store_Products extends Zend_Db_Table_Abstract{
protected $_name = 'products';
public function getAllProducts(){
$select = $this->$select()
->from(array('P'=>$this->_name),
array('id', 'name', 'price', availability));
$productsArray = $this->fetchAll($select);
return $productsArray;
}
}
And ta-da, you have your array of products ready to be used by the controller:
class Store_ProductsController extends Zend_Controller_Action {
public function indexAction(){
$model = new Model_Store_Products();
$products = $model->getAllProducts();
$this->view->products = $products;
}
}
It can be said that, since fetchAll is public function, and our select does basically nothing but set which columns do we want (it doesn't even have a where clause), in this case, it would be easier to call the fetchAll directly from the controller with no where and it will recover the whole table (all columns):
class Store_ProductsController extends Zend_Controller_Action {
public function indexAction(){
$model = new Model_Store_Products();
$products = $model->fetchAll();
$this->view->products = $products;
}
}
Thus, our function in the model is not even needed.
This is the basic information of how to access to the database using Zend Framework. Further information of how to create the Zend_Db_Table_Select object can be found here.
I hope this helps.

Mapping two tables to one entity in Doctrine2

I'm looking at using doctrine for an application I'm working on - but after reading the documentation I'm having trouble conceptualizing how to represent the database structure we have in terms of entities.
I have many tables which have partner tables which hold translation data like the following....
Where I would like to have one Entity (Navigation Element) which had access to the 'label' field depending on what Language I set in my application. The following from the Doctrine documentation seems to suggest that you need to define one (single) table which is used to persist an entity
http://www.doctrine-project.org/docs/orm/2.0/en/reference/basic-mapping.html
By default, the entity will be
persisted to a table with the same
name as the class name. In order to
change that, you can use the #Table
annotation as follows:
Or do I need to define two entities and link them (or allow the translation table to inherit from the element table).
And what strategy would I use to always insert a language_id clause to the Join (to ensure I'm pulling the right label for the currently set language). Is this something I would define in the entity itself, or elsewhere?
This seems to suit a One-To-Many Bidirectional association. This is the scenario from that page translated to your situation:
/** #Entity */
class NavigationElement
{
// ...
/**
* #OneToMany(targetEntity="NavigationElementTranslation", mappedBy="navigationElement")
*/
private $translations;
// ...
public function __construct() {
$this->translations = new \Doctrine\Common\Collections\ArrayCollection();
}
}
/** #Entity */
class NavigationElementTranslation
{
// ...
/**
* #ManyToOne(targetEntity="NavigationElement", inversedBy="translations")
* #JoinColumn(name="navigation_element_id", referencedColumnName="id")
*/
private $navigationElement;
// ...
}
You could add a getLabel($languageId) method to the NavigationElement entity that searches through the translations to get the correct label:
public function getLabel($languageId) {
foreach($this->translations as $trans) {
if($trans->languageId == $languageId)
return $trans->label;
}
throw new InvalidArgumentException();
}
And you could use the following DQL to ensure you only load the translation you want into the $translations property:
$query = $em->createQuery(
"SELECT ne, net
FROM Entity\NavigationElement ne
JOIN ne.translations net WITH net.languageId = :langId"
);
$query->setParameter('langId', $languageId);
$navigationElements = $query->execute();
This situation sounds like one where you would want to cache aggressively. Make sure you look into Doctrine 2's caching mechanisms too.
Also, internationalization can be handled reasonably well in PHP with gettext if you find join tables for translations start to become unmanageable.
I would also direct anyone who has to tackle this same problem to take a look at the following doctrine extension.
http://www.gediminasm.org/article/translatable-behavior-extension-for-doctrine-2

kohana ORM question

i am using kohana ORM in order to get some results from the database. My problem is: even though i have consulted the documentation, i can't find a way to select only the column i am interested in. To be more explicit, i have:
$sale_stock = Model::factory('product_type')
->where('product_type_id','=', $id )
-> find_all();
var dumping it, it selects me all the "SELECT product_type.* from product_type where etc".
But i want to select only the 'stock' field from the salestock table. doing find('stock') instead find_all() returns a weired object... Where am i wrong, and how can i actually select only the column 'stock' using kohana orm?
thank you!
ORM methods find() and find_all() always select all table columns, so there is two ways to get specified fields:
Load full table rows and get columns
from it:
$sale_stock = Model::factory('product_type')
->where('product_type_id','=', $id )
-> find_all();
// get array of id=>stock values
$columns = $sale_stock->as_array('id', 'stock');
Create special method in model using
Query Builder:
// model Model_Product_Type
public function get_stocks($product_type_id)
{
return DB::select(array('stock'))
->from($this->_table_name)
->where('product_type_id', '=', $product_type_id)
->execute($this->_db);
}
I realise this isn't exactly what you're looking for, but I've pulled the following from the Kohana documentation ...
$articles = ORM::factory('article')->select_list('id', 'title');
foreach ($articles as $id => $title)
{
// Display a list of links
echo html::anchor('articles/'.$id, $title);
}
// Display a dropdown list
echo form::dropdown('articles', $articles);
You could think of it as a discount, two fields for the price of one.
It's common practice for ORMs to return a 'non-standard' object when partial model or merged model fields are requested. This prevents confusing operations using the original object (ie. how do you save an object when it contains only 2 of 8 fields, plus maybe some fields from another model?).
If you print_r the object, and give me an indication of how that looks ... it might be just what you want.
I know this is an old question, but i found maybe easier solution:
$sale_stock = ORM::factory('product_type')
->where( 'product_type_id','=', $id )
->find_all();
die($sale_stock->stock);