How to properly annotate an abstract base component with life cycle hooks in Angular
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I have an abstract base component with life cycle hooks:
export abstract class BaseComponent implements OnChanges, OnInit {
ngOnChanges(changes: SimpleChanges): void {
…
}
ngOnInit() {
…
}
}
And a child component:
@Component({
…
})
export class ChildComponent extends BaseComponent {
This will result in Can't resolve all parameters for BaseComponent: (?, ?, ?).
The parameter indeed has three parameters. All three values are listed in the providers section of the module containing the child component. Adding the base component to the module is not possible since it is not compatible with the type required for declarations.
If I add @Injectable() to the BaseComponent tslint will complain that In the class "BaseComponent" which have the "@Injectable" decorator, the "ngOnChanges()" hook method is not allowed. Please, drop it. (contextual-life-cycle). Everything works fine though.
Adding @Component() to the BaseComponent results in Webstorm complaning about Component 'BaseComponent' is not included in a module and will not be available inside a template. Consider adding it to a NgModule declaration. Again, code runs fine.
Since I like to keep my code clear of any warnings: What is the correct way to implement this pattern?
angular asked Nov 24 '18 at 0:22
Georg M. SorstGeorg M. Sorst
117112
add a comment |
I have an abstract base component with life cycle hooks:
export abstract class BaseComponent implements OnChanges, OnInit {
ngOnChanges(changes: SimpleChanges): void {
…
}
ngOnInit() {
…
}
}
And a child component:
@Component({
…
})
export class ChildComponent extends BaseComponent {
This will result in Can't resolve all parameters for BaseComponent: (?, ?, ?).
The parameter indeed has three parameters. All three values are listed in the providers section of the module containing the child component. Adding the base component to the module is not possible since it is not compatible with the type required for declarations.
If I add @Injectable() to the BaseComponent tslint will complain that In the class "BaseComponent" which have the "@Injectable" decorator, the "ngOnChanges()" hook method is not allowed. Please, drop it. (contextual-life-cycle). Everything works fine though.
Adding @Component() to the BaseComponent results in Webstorm complaning about Component 'BaseComponent' is not included in a module and will not be available inside a template. Consider adding it to a NgModule declaration. Again, code runs fine.
Since I like to keep my code clear of any warnings: What is the correct way to implement this pattern?
angular asked Nov 24 '18 at 0:22
Georg M. SorstGeorg M. Sorst
117112
3
Can't resolve all parameters for BaseComponent: (?, ?, ?)looks like an error related to the constructor. Can you update your question to show the constructors for the classes.
– cgTag
Nov 24 '18 at 0:29
Updated to included info about the constructor.
– Georg M. Sorst
Nov 26 '18 at 21:55
add a comment |
I have an abstract base component with life cycle hooks:
export abstract class BaseComponent implements OnChanges, OnInit {
ngOnChanges(changes: SimpleChanges): void {
…
}
ngOnInit() {
…
}
}
And a child component:
@Component({
…
})
export class ChildComponent extends BaseComponent {
This will result in Can't resolve all parameters for BaseComponent: (?, ?, ?).
The parameter indeed has three parameters. All three values are listed in the providers section of the module containing the child component. Adding the base component to the module is not possible since it is not compatible with the type required for declarations.
If I add @Injectable() to the BaseComponent tslint will complain that In the class "BaseComponent" which have the "@Injectable" decorator, the "ngOnChanges()" hook method is not allowed. Please, drop it. (contextual-life-cycle). Everything works fine though.
Adding @Component() to the BaseComponent results in Webstorm complaning about Component 'BaseComponent' is not included in a module and will not be available inside a template. Consider adding it to a NgModule declaration. Again, code runs fine.
Since I like to keep my code clear of any warnings: What is the correct way to implement this pattern?
angular asked Nov 24 '18 at 0:22
Georg M. SorstGeorg M. Sorst
117112
I have an abstract base component with life cycle hooks:
export abstract class BaseComponent implements OnChanges, OnInit {
ngOnChanges(changes: SimpleChanges): void {
…
}
ngOnInit() {
…
}
}
And a child component:
@Component({
…
})
export class ChildComponent extends BaseComponent {
This will result in Can't resolve all parameters for BaseComponent: (?, ?, ?).
The parameter indeed has three parameters. All three values are listed in the providers section of the module containing the child component. Adding the base component to the module is not possible since it is not compatible with the type required for declarations.
If I add @Injectable() to the BaseComponent tslint will complain that In the class "BaseComponent" which have the "@Injectable" decorator, the "ngOnChanges()" hook method is not allowed. Please, drop it. (contextual-life-cycle). Everything works fine though.
Adding @Component() to the BaseComponent results in Webstorm complaning about Component 'BaseComponent' is not included in a module and will not be available inside a template. Consider adding it to a NgModule declaration. Again, code runs fine.
Since I like to keep my code clear of any warnings: What is the correct way to implement this pattern?
angular angular asked Nov 24 '18 at 0:22
Georg M. SorstGeorg M. Sorst
117112
asked Nov 24 '18 at 0:22
Georg M. SorstGeorg M. Sorst
117112
edited Nov 26 '18 at 21:55
Georg M. Sorst
asked Nov 24 '18 at 0:22
Georg M. SorstGeorg M. Sorst
117112
asked Nov 24 '18 at 0:22
Georg M. SorstGeorg M. Sorst
117112
asked Nov 24 '18 at 0:22
Georg M. SorstGeorg M. Sorst
117112
117112
3
Can't resolve all parameters for BaseComponent: (?, ?, ?)looks like an error related to the constructor. Can you update your question to show the constructors for the classes.
– cgTag
Nov 24 '18 at 0:29
Updated to included info about the constructor.
– Georg M. Sorst
Nov 26 '18 at 21:55
add a comment |
3
Can't resolve all parameters for BaseComponent: (?, ?, ?)looks like an error related to the constructor. Can you update your question to show the constructors for the classes.
– cgTag
Nov 24 '18 at 0:29
Updated to included info about the constructor.
– Georg M. Sorst
Nov 26 '18 at 21:55
3
3
Can't resolve all parameters for BaseComponent: (?, ?, ?) looks like an error related to the constructor. Can you update your question to show the constructors for the classes.– cgTag
Nov 24 '18 at 0:29
Can't resolve all parameters for BaseComponent: (?, ?, ?) looks like an error related to the constructor. Can you update your question to show the constructors for the classes.– cgTag
Nov 24 '18 at 0:29
Updated to included info about the constructor.
– Georg M. Sorst
Nov 26 '18 at 21:55
Updated to included info about the constructor.
– Georg M. Sorst
Nov 26 '18 at 21:55
add a comment |
1 Answer
1
active
oldest
votes
Not annotating the base component at all (neither @Injectable nor @Component) did the trick for me.
answered Feb 3 at 13:14
Georg M. SorstGeorg M. Sorst
117112
add a comment |
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1 Answer
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1 Answer
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oldest
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oldest
votes
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votes
Not annotating the base component at all (neither @Injectable nor @Component) did the trick for me.
answered Feb 3 at 13:14
Georg M. SorstGeorg M. Sorst
117112
add a comment |
Not annotating the base component at all (neither @Injectable nor @Component) did the trick for me.
answered Feb 3 at 13:14
Georg M. SorstGeorg M. Sorst
117112
add a comment |
Not annotating the base component at all (neither @Injectable nor @Component) did the trick for me.
answered Feb 3 at 13:14
Georg M. SorstGeorg M. Sorst
117112
Not annotating the base component at all (neither @Injectable nor @Component) did the trick for me.
answered Feb 3 at 13:14
Georg M. SorstGeorg M. Sorst
117112
answered Feb 3 at 13:14
Georg M. SorstGeorg M. Sorst
117112
answered Feb 3 at 13:14
Georg M. SorstGeorg M. Sorst
117112
answered Feb 3 at 13:14
Georg M. SorstGeorg M. Sorst
117112
117112
add a comment |
add a comment |
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Can't resolve all parameters for BaseComponent: (?, ?, ?)looks like an error related to the constructor. Can you update your question to show the constructors for the classes.– cgTag
Nov 24 '18 at 0:29
Updated to included info about the constructor.
– Georg M. Sorst
Nov 26 '18 at 21:55