I have a many-to-many relationship for Customer and Product objects.
Since I need some additional properties for this relationship, I've manually added CustomerProductAssignment object that would incorporate them.
When I create new CustomerProductAssignment from either Customer or Product the fields identifying parent object remain blank (valid for one-to-many relationship too).
I'd like these fields to be filled automatically based on the parent object, from where New button was clicked.
Is there an easy way for doing that?
Decorate your collections with the Aggregated attribute
Related
I am using the sonata tree view for the Category entity, and the order is displayed by id , I want to change the order and make it by another key like updateAt for example, and here is tree.html.twig used for this purpose, existed here: vendor/sonata-project/admin-bundle/Resources/views/CRUD/tree.html.twig
and whether can I change it in the twig file or in the CategoryAdmin and how to do it.
Let's say I have a Setting entity with some fields like IntValue, dateValue, stringValue and some linked entities, like countries (ManyToMany to entity Country), languages (ManyToMany to Language) etc.
Settings are created by users and assigned to specific objects (not important here, but I wanted to clarify).
Now I suddenly need to have UserDefaultSetting, which will be the same, but with additional user field (ManyToOne to User entity).
I tried to extend existing Setting entity class with one more field added. The problem is, as I looked at the schema update SQL, it created new table for the new entity, but without all the tables needed to ORM connections (mostly ManyToMany). Just one table with "scalar" fields.
So previously I've had setting table with int_value, date_value etc. but also setting_country and setting_language tables, linking ManyToMany relations. After creating child entity, Doctrine created only user_default_setting table with int_value, date_value etc. and additionally user_id column, but I can't see any relation/link tables.
I know I should've been do it with abstract base entity class, but at the time I started, I didn't know that and now part of the project is on production (don't look at me like that, I blame the client) and I don't want to change that "base" class now. Can I inherit everything from non-abstract entity class in a way it will work?
UPDATE: everything explained. See Cerad's comment. Thanks!
I have entities "Article" and "Product". Now I want to add comments to these 2 entities. Should I create 2 different entities "ArticleComment" and "ProductComment" with the same properties, and build a ManyToOne relation to their respective entity, or create a single "Comment" entity and find a way to build a relation to both "Article" and "Product" entities. Considering solution #2, how could I do that ?
Considering solution #2, how could I do that ?
One way would be to use Single Table Inheritance
Single Table Inheritance is an inheritance mapping strategy where all classes of a hierarchy are mapped to a single database table. In order to distinguish which row represents which type in the hierarchy a so-called discriminator column is used.
This means that you can easily create two separate entities ArticleComment and ProductComment both extending Comment. Then you use the advantages DiscriminatorMap column provides.
Your Comment entity could hold a relation called parent for instance that would refer to either your Article or Product entities. By creating new instance of ArticleComment or ProductComment your discriminator map field would be automatically populated depending on which type you're using.
This would also give you advantages with using DQL to query related comments by their type. Example from documentation:
$query = $em->createQuery('SELECT u FROM Doctrine\Tests\Models\Company\CompanyPerson u WHERE u INSTANCE OF Doctrine\Tests\Models\Company\CompanyEmployee');
And more. You can read that chapter here. Of course this is just a sample and you can use completely different approach.
I've got a model as described below :
I've also got a form to create a new product with a field entity building a dropdown list containing all the Brands.
Now I want to add a value "Other" in this list in order to allow the user to specify the Brand manually in another text field.
The question is: is there a clean way to manage this case (eg. adding the value "Other" in the list, which is not an entity and get the form validation to work) with Symfony2 forms?
You can do it in two ways,
You can subscribe for FormEvents::BIND_CLIENT_DATA form event. In the event method you can create new Brand object from the text, save it and set the id to the form by calling $event->setData($data). See this cookbook entry.
OR
You can append a data transformer. In its reverseTransform method you can create+save the object and return its id. See this cookbook entry.
I have 3 tables(Roles,Actions and RoleActionLinks). Roles table has few columns(RoleID,RoleName,Desc). Actions table has few colums(ActionID,ActionName,Desc). In RoleActionLink is created for store the association between Roles and Actions and this table has the columns such as RoleID,ActionID
When I created the data model(edmx). it shows only Role and Action as entity. i did not find RoleActionLink table. but even there is no direct relation between Roles and Actions table, both tables are automatically related using RoleActionLink table.
When i create the new Action, a action record should be populated in Action table(this is works fine). At the same time, i need to populate record in RoleActionLinks table. But i dont have the entity to populate.
Please tell me how to accomplish my needs.
This should work:
newAction.Roles.Add(role1);
newAction.Roles.Add(role2);
Look at navigation properties in your model. There should be EntityCollection called Roles (name may differ).
Entity framework automatically handles n-n tables and creates collections on both sides.