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What is Context Object purpose in any class's constructor DI ? How Context works?
Planned maintenance scheduled April 23, 2019 at 23:30 UTC (7:30pm US/Eastern)
Announcing the arrival of Valued Associate #679: Cesar Manara
Unicorn Meta Zoo #1: Why another podcast?Context dependency in Magento2Is this really the best DI works when extending class constructors?How to debug Call to a member function dispatch() on null ininternalMagentoFrameworkAppActionAction.php on line 91Magento 2 Incorrect dependency in class already exists in context objectMagento 2 : Problem extending a BlockHow to call a model method from controller in Magento2I created a custom module ,but getting error, not able to figure out what the error is about. How to get out of this error?Magento 2.1: Invoke urlBuilder->getUrl() in a controller in a custom moduleModel Override issue in magento 2After rewrite MagentoCustomerModelAccountManagement giving me fatal errorDI not working in ControllerMonolog Error After 2.2 UpgradeI am trying to override multishipping.php file in vendor/magento/module-multishipping/Model/Checkout/Type/Multishipping.phpPHP fatal error: Uncaught TypeError: Argument 2 passed to MagentoCatalogPluginBlockTopmenuMagento 2.3 Can't view module's front end page output?
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;
In most of the class's Constructors, a Context object is passed . I couldn't understand how this Context Obj works . I also noticed that sometimes this is passed to parent class's constructor like below.
public function __construct(
MagentoFrameworkAppActionContext $context,
MagentoCatalogModelDesign $catalogDesign,
MagentoCatalogModelSession $catalogSession,
....
parent::__construct(
$context,
$layoutFactory,
Can you please explain how this specific context object works ?
magento2 architecture
edited Mar 28 '16 at 7:01
Fabian Schmengler
55.4k21139354
asked Mar 28 '16 at 4:35
learnerlearner
11614
add a comment |
In most of the class's Constructors, a Context object is passed . I couldn't understand how this Context Obj works . I also noticed that sometimes this is passed to parent class's constructor like below.
public function __construct(
MagentoFrameworkAppActionContext $context,
MagentoCatalogModelDesign $catalogDesign,
MagentoCatalogModelSession $catalogSession,
....
parent::__construct(
$context,
$layoutFactory,
Can you please explain how this specific context object works ?
magento2 architecture
edited Mar 28 '16 at 7:01
Fabian Schmengler
55.4k21139354
asked Mar 28 '16 at 4:35
learnerlearner
11614
add a comment |
In most of the class's Constructors, a Context object is passed . I couldn't understand how this Context Obj works . I also noticed that sometimes this is passed to parent class's constructor like below.
public function __construct(
MagentoFrameworkAppActionContext $context,
MagentoCatalogModelDesign $catalogDesign,
MagentoCatalogModelSession $catalogSession,
....
parent::__construct(
$context,
$layoutFactory,
Can you please explain how this specific context object works ?
magento2 architecture
edited Mar 28 '16 at 7:01
Fabian Schmengler
55.4k21139354
asked Mar 28 '16 at 4:35
learnerlearner
11614
In most of the class's Constructors, a Context object is passed . I couldn't understand how this Context Obj works . I also noticed that sometimes this is passed to parent class's constructor like below.
public function __construct(
MagentoFrameworkAppActionContext $context,
MagentoCatalogModelDesign $catalogDesign,
MagentoCatalogModelSession $catalogSession,
....
parent::__construct(
$context,
$layoutFactory,
Can you please explain how this specific context object works ?
magento2 architecture
magento2 architecture
edited Mar 28 '16 at 7:01
Fabian Schmengler
55.4k21139354
asked Mar 28 '16 at 4:35
learnerlearner
11614
edited Mar 28 '16 at 7:01
Fabian Schmengler
55.4k21139354
asked Mar 28 '16 at 4:35
learnerlearner
11614
edited Mar 28 '16 at 7:01
Fabian Schmengler
55.4k21139354
edited Mar 28 '16 at 7:01
Fabian Schmengler
55.4k21139354
edited Mar 28 '16 at 7:01
Fabian Schmengler
55.4k21139354
55.4k21139354
asked Mar 28 '16 at 4:35
learnerlearner
11614
asked Mar 28 '16 at 4:35
learnerlearner
11614
asked Mar 28 '16 at 4:35
learnerlearner
11614
11614
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
Note that there are different Context objects, in this case it's MagentoFrameworkAppActionContext and to understand it, you should read it as "ActionContext". It represents the application context in which the action is executed. In other words, it gives you access to all objects with application state that a controller action needs, for example the registry or the request object.
The context classes don't have own functionality, they are just a container for other objects. You can see them as shortcut to not have 20 parameters in each controller action. All common parameters are merged in the context object.
answered Mar 28 '16 at 6:59
Fabian SchmenglerFabian Schmengler
55.4k21139354
how could i know which object are contained by different$context?
– LucScu
Jun 9 '16 at 6:48
@LucaS look at their source code. You find the contained classes in the context constructor
– Fabian Schmengler
Jun 9 '16 at 7:22
add a comment |
Context objects were introduced to isolate third party developers from changes in constructors of abstract classes.
In Magento 1 Abstract classes with a lot of "helper" behaviour were considered a convenient API for class extender. This caused huge numbers of methods and implicit dependencies in abstract classes (AbstractModel, AbstractBlock, AbstractAction)
In Magento 2 inheritance-based APIs (more precisely SPIs) are discouraged, but many legacy APIs still exist. Initially we planned to gradually remove extra behaviour from abstract classes. And to not break all extenders when we would remove some dependency from constructor, we introduced Context objects.
Current plan is to abandon inheritance-based APIs with interface-based APIs at some point.
answered Dec 6 '16 at 10:01
Anton KrilAnton Kril
4,0461321
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
Note that there are different Context objects, in this case it's MagentoFrameworkAppActionContext and to understand it, you should read it as "ActionContext". It represents the application context in which the action is executed. In other words, it gives you access to all objects with application state that a controller action needs, for example the registry or the request object.
The context classes don't have own functionality, they are just a container for other objects. You can see them as shortcut to not have 20 parameters in each controller action. All common parameters are merged in the context object.
answered Mar 28 '16 at 6:59
Fabian SchmenglerFabian Schmengler
55.4k21139354
how could i know which object are contained by different$context?
– LucScu
Jun 9 '16 at 6:48
@LucaS look at their source code. You find the contained classes in the context constructor
– Fabian Schmengler
Jun 9 '16 at 7:22
add a comment |
Note that there are different Context objects, in this case it's MagentoFrameworkAppActionContext and to understand it, you should read it as "ActionContext". It represents the application context in which the action is executed. In other words, it gives you access to all objects with application state that a controller action needs, for example the registry or the request object.
The context classes don't have own functionality, they are just a container for other objects. You can see them as shortcut to not have 20 parameters in each controller action. All common parameters are merged in the context object.
answered Mar 28 '16 at 6:59
Fabian SchmenglerFabian Schmengler
55.4k21139354
how could i know which object are contained by different$context?
– LucScu
Jun 9 '16 at 6:48
@LucaS look at their source code. You find the contained classes in the context constructor
– Fabian Schmengler
Jun 9 '16 at 7:22
add a comment |
Note that there are different Context objects, in this case it's MagentoFrameworkAppActionContext and to understand it, you should read it as "ActionContext". It represents the application context in which the action is executed. In other words, it gives you access to all objects with application state that a controller action needs, for example the registry or the request object.
The context classes don't have own functionality, they are just a container for other objects. You can see them as shortcut to not have 20 parameters in each controller action. All common parameters are merged in the context object.
answered Mar 28 '16 at 6:59
Fabian SchmenglerFabian Schmengler
55.4k21139354
Note that there are different Context objects, in this case it's MagentoFrameworkAppActionContext and to understand it, you should read it as "ActionContext". It represents the application context in which the action is executed. In other words, it gives you access to all objects with application state that a controller action needs, for example the registry or the request object.
The context classes don't have own functionality, they are just a container for other objects. You can see them as shortcut to not have 20 parameters in each controller action. All common parameters are merged in the context object.
answered Mar 28 '16 at 6:59
Fabian SchmenglerFabian Schmengler
55.4k21139354
answered Mar 28 '16 at 6:59
Fabian SchmenglerFabian Schmengler
55.4k21139354
answered Mar 28 '16 at 6:59
Fabian SchmenglerFabian Schmengler
55.4k21139354
answered Mar 28 '16 at 6:59
Fabian SchmenglerFabian Schmengler
55.4k21139354
55.4k21139354
how could i know which object are contained by different$context?
– LucScu
Jun 9 '16 at 6:48
@LucaS look at their source code. You find the contained classes in the context constructor
– Fabian Schmengler
Jun 9 '16 at 7:22
add a comment |
how could i know which object are contained by different$context?
– LucScu
Jun 9 '16 at 6:48
@LucaS look at their source code. You find the contained classes in the context constructor
– Fabian Schmengler
Jun 9 '16 at 7:22
how could i know which object are contained by different
$context?– LucScu
Jun 9 '16 at 6:48
how could i know which object are contained by different
$context?– LucScu
Jun 9 '16 at 6:48
@LucaS look at their source code. You find the contained classes in the context constructor
– Fabian Schmengler
Jun 9 '16 at 7:22
@LucaS look at their source code. You find the contained classes in the context constructor
– Fabian Schmengler
Jun 9 '16 at 7:22
add a comment |
Context objects were introduced to isolate third party developers from changes in constructors of abstract classes.
In Magento 1 Abstract classes with a lot of "helper" behaviour were considered a convenient API for class extender. This caused huge numbers of methods and implicit dependencies in abstract classes (AbstractModel, AbstractBlock, AbstractAction)
In Magento 2 inheritance-based APIs (more precisely SPIs) are discouraged, but many legacy APIs still exist. Initially we planned to gradually remove extra behaviour from abstract classes. And to not break all extenders when we would remove some dependency from constructor, we introduced Context objects.
Current plan is to abandon inheritance-based APIs with interface-based APIs at some point.
answered Dec 6 '16 at 10:01
Anton KrilAnton Kril
4,0461321
add a comment |
Context objects were introduced to isolate third party developers from changes in constructors of abstract classes.
In Magento 1 Abstract classes with a lot of "helper" behaviour were considered a convenient API for class extender. This caused huge numbers of methods and implicit dependencies in abstract classes (AbstractModel, AbstractBlock, AbstractAction)
In Magento 2 inheritance-based APIs (more precisely SPIs) are discouraged, but many legacy APIs still exist. Initially we planned to gradually remove extra behaviour from abstract classes. And to not break all extenders when we would remove some dependency from constructor, we introduced Context objects.
Current plan is to abandon inheritance-based APIs with interface-based APIs at some point.
answered Dec 6 '16 at 10:01
Anton KrilAnton Kril
4,0461321
add a comment |
Context objects were introduced to isolate third party developers from changes in constructors of abstract classes.
In Magento 1 Abstract classes with a lot of "helper" behaviour were considered a convenient API for class extender. This caused huge numbers of methods and implicit dependencies in abstract classes (AbstractModel, AbstractBlock, AbstractAction)
In Magento 2 inheritance-based APIs (more precisely SPIs) are discouraged, but many legacy APIs still exist. Initially we planned to gradually remove extra behaviour from abstract classes. And to not break all extenders when we would remove some dependency from constructor, we introduced Context objects.
Current plan is to abandon inheritance-based APIs with interface-based APIs at some point.
answered Dec 6 '16 at 10:01
Anton KrilAnton Kril
4,0461321
Context objects were introduced to isolate third party developers from changes in constructors of abstract classes.
In Magento 1 Abstract classes with a lot of "helper" behaviour were considered a convenient API for class extender. This caused huge numbers of methods and implicit dependencies in abstract classes (AbstractModel, AbstractBlock, AbstractAction)
In Magento 2 inheritance-based APIs (more precisely SPIs) are discouraged, but many legacy APIs still exist. Initially we planned to gradually remove extra behaviour from abstract classes. And to not break all extenders when we would remove some dependency from constructor, we introduced Context objects.
Current plan is to abandon inheritance-based APIs with interface-based APIs at some point.
answered Dec 6 '16 at 10:01
Anton KrilAnton Kril
4,0461321
answered Dec 6 '16 at 10:01
Anton KrilAnton Kril
4,0461321
answered Dec 6 '16 at 10:01
Anton KrilAnton Kril
4,0461321
answered Dec 6 '16 at 10:01
Anton KrilAnton Kril
4,0461321
4,0461321
add a comment |
add a comment |
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