Chapters

28 Chapters | 2:24:59 |

01

Give me Clean URL Strings (slugs!)

5:39
02

DoctrineExtensions: Sluggable

4:59
03

Refactoring Carefully

3:41
04

ManyToMany Relationship

5:18
05

Inserting into a ManyToMany

5:27
06

Fetching Items from a ManyToMany Collection

3:45
07

ManyToMany: The Inverse Side of the Relationship

6:45
08

Removing a ManyToMany Item

5:16
09

Hooking up the Scientist Removal JavaScript

2:50
10

ManyToMany & Fixtures

3:30
11

Joining Across a ManyToMany + EXTRA_LAZY Fetch

5:34
12

EntityType Checkboxes with ManyToMany

5:39
13

Saving the Inverse Side of a ManyToMany

4:03
14

Form by_reference + Adder and Remover

4:40
15

Synchronizing Owning & Inverse Sides

4:03
16

ManyToMany with Extra Fields

8:20
17

Join Entity App Refactoring

2:40
18

Using the new OneToMany Collections

5:46
19

Embedded Form: CollectionType

6:36
20

Collection Delete & allow_delete

4:49
21

Deleting an Item from a Collection: orphanRemoval

5:14
22

CollectionType: Adding New with the Prototype

7:07
23

Adding to a Collection: Cascade Persist

6:04
24

Embedded Form Validation with @Valid

5:05
25

Customizing the Collection Form Prototype

5:56
26

Form Events: A readonly Embedded Field

4:46
27

Collection Filtering: The Easy Way

6:05
28

Criteria System: Champion Collection Filtering

5:24

> Symfony 3 > Doctrine Collections: ManyToMany, Forms & other Complex Relations

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27.

Collection Filtering: The Easy Way

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8 Comments

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Peter-K 7 years ago

I am struggling with my scenario:

Imagine you have a Teacher, Subject, Room entities.

Teacher can teach many Subjects
Teacher can teach in many Rooms

Subject can be tough in many Rooms so rooms and subjects are linked but 1 Room can have 1 subject. OneToMany

Now imagine I want to create a Teacher so I will select Subjects(teacherSubjects = arrayCollection)
After subjects have been added I can pre-filter Rooms available and store them (teacherRooms = arrayCollection)

Now I will remove subject from the removeSubject and click save.

I want automatically remove all associated Rooms from teacherRooms.

I tried to do it inside removeSubject but when form is submitted it is not even triggering this method same is happening when I am adding new subject method addSubject is not hit.

I know I could probably solve this if I decide to set this field as not mapped but I would assume this can be done automatically.

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sadikoff Peter-K 7 years ago edited

Hey Peter K.

Yeah you have a tricky situation. As I know this cannot be done automatically because this fields are not synced, to sync them you can create Doctrine entity listener, and listen to PreUpdate and probable PrePersist and check your list changes and sync lists.

Hope this will help. Cheers!

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Peter-K sadikoff 7 years ago

I decided to go the unmapped field way

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sadikoff Peter-K 7 years ago

Awesome! This is one of real super powers of Symfony! You choose the way you want to code =)

Cheers!

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Tac-Tacelosky 7 years ago

Typo: "

Oh my, a Missing inversedBt" should be inverseBy

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Victor SFCASTS Tac-Tacelosky 7 years ago

Hey Michael,

Ah, great catch! Thank you for pointing it out! It was fixed in https://github.com/knpunive...

Cheers!

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Tac-Tacelosky Victor 7 years ago

Great, I didn't know the course content was available on gitub. I'm not familiar with the github [[[ code('..') ]]], how is that set up? (Searching for 'github code' gets everything!). Is it a gist? Or something you tag in the code somehow?

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Victor SFCASTS Tac-Tacelosky 7 years ago

Hey Michael,

Yeah, that's a little-known fact. You may even notice a pencil icon on course chapter pages in the right top corner of scripts. If you press it - it will move you to the corresponding page on GitHub.

About that [[[ code('..') ]]] syntax - it's our own, we implemented it internally. It is dynamically replaced with actual code blocks, but we use an internal tool that helps to display specific code on different steps. It helps us to show the *actual* code on chapter pages - no more outdated static code blocks. And that's the one of our coolest features on SymfonyCasts. :)

Cheers!

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This course is built on Symfony 3, but most of the concepts apply just fine to newer versions of Symfony.

Symfony 3

What PHP libraries does this tutorial use?

// composer.json
{
    "require": {
        "php": "^7.1.3",
        "symfony/symfony": "3.4.*", // v3.4.49
        "doctrine/orm": "^2.5", // 2.7.5
        "doctrine/doctrine-bundle": "^1.6", // 1.12.13
        "doctrine/doctrine-cache-bundle": "^1.2", // 1.4.0
        "symfony/swiftmailer-bundle": "^2.3", // v2.6.7
        "symfony/monolog-bundle": "^2.8", // v2.12.1
        "symfony/polyfill-apcu": "^1.0", // v1.23.0
        "sensio/distribution-bundle": "^5.0", // v5.0.25
        "sensio/framework-extra-bundle": "^3.0.2", // v3.0.29
        "incenteev/composer-parameter-handler": "^2.0", // v2.1.4
        "composer/package-versions-deprecated": "^1.11", // 1.11.99.4
        "knplabs/knp-markdown-bundle": "^1.4", // 1.9.0
        "doctrine/doctrine-migrations-bundle": "^1.1", // v1.3.2
        "stof/doctrine-extensions-bundle": "^1.2" // v1.3.0
    },
    "require-dev": {
        "sensio/generator-bundle": "^3.0", // v3.1.7
        "symfony/phpunit-bridge": "^3.0", // v3.4.47
        "nelmio/alice": "^2.1", // v2.3.6
        "doctrine/doctrine-fixtures-bundle": "^2.3" // v2.4.1
    }
}

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