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Argument of type string is not assignable to paramMap

Typescript Type 'string' is not assignable to typeAngular 2 | Directives Argument of type '' is not assignable toArgument of type 'number' is not assignable to parameter of type 'string'Angular HTTP requestNot able to get storage varialbe on another class app.component.ts in IONICType 'SQLiteOriginal' is not assignable to type 'Provider'Type 'AppVersionOriginal' is not assignable to type 'Provider'. Type 'AppVersionOriginal' is missing the following propertiArgument of type 'File' is not assignable to parameter of type 'string | Blob' in formDataAngular 2 observables dynamic filters between sibling components (Google Font like)Can't get JSON request from my local server in Ionic 4

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0

I tried to create some basic function in the ionic framework.

I have declared ID as a number in model.ts and created a function to access that value using paramMap it shows an error that string is not assignable to a number.

I am using Ionic 4.0.

ngOnInit() 
 this.route.paramMap.subscribe(paramMap => 
 if (!paramMap.has('placeId')) 
 this.navCtrl.navigateBack('/places/tabs/discover');
 return;
 
 this.place = this.placesService.getplace(paramMap.get('placeId'));
 );
 

service.ts is where I wrote the getplace function:

getplace(id: number) 
 return ...this._places.find(
 p => p.id === id
 );
 

Model:

import Time from '@angular/common';
export class place 
 constructor(
 public id: number,
 public user_id: number,
 public title: string,
 public cooked_time: Date,
 public dispose_time: Date,
 public food_type: string,
 public description: string,
 public serve_quantity: number,
 public imageUrl: string,
 public lat: number,
 public long: number
 ) 

I am expecting to pass a number and that function is taking it as a string.

angular ionic-framework ionic4

share|improve this question

edited Mar 24 at 17:30

marc_s

592k13311321278

asked Mar 24 at 16:17

Pushpendra PalPushpendra Pal

237

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  can't you cast via <number>
  
  – jcuypers
  Mar 24 at 16:21
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @jcuypers bro I am totally new to it can you just gimme a dummy example
  
  – Pushpendra Pal
  Mar 24 at 16:24
  

  
  
  
  

add a comment | 

0

I tried to create some basic function in the ionic framework.

I have declared ID as a number in model.ts and created a function to access that value using paramMap it shows an error that string is not assignable to a number.

I am using Ionic 4.0.

ngOnInit() 
 this.route.paramMap.subscribe(paramMap => 
 if (!paramMap.has('placeId')) 
 this.navCtrl.navigateBack('/places/tabs/discover');
 return;
 
 this.place = this.placesService.getplace(paramMap.get('placeId'));
 );
 

service.ts is where I wrote the getplace function:

getplace(id: number) 
 return ...this._places.find(
 p => p.id === id
 );
 

Model:

import Time from '@angular/common';
export class place 
 constructor(
 public id: number,
 public user_id: number,
 public title: string,
 public cooked_time: Date,
 public dispose_time: Date,
 public food_type: string,
 public description: string,
 public serve_quantity: number,
 public imageUrl: string,
 public lat: number,
 public long: number
 ) 

I am expecting to pass a number and that function is taking it as a string.

angular ionic-framework ionic4

share|improve this question

edited Mar 24 at 17:30

marc_s

592k13311321278

asked Mar 24 at 16:17

Pushpendra PalPushpendra Pal

237

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  can't you cast via <number>
  
  – jcuypers
  Mar 24 at 16:21
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @jcuypers bro I am totally new to it can you just gimme a dummy example
  
  – Pushpendra Pal
  Mar 24 at 16:24
  

  
  
  
  

add a comment | 

I tried to create some basic function in the ionic framework.

I have declared ID as a number in model.ts and created a function to access that value using paramMap it shows an error that string is not assignable to a number.

I am using Ionic 4.0.

ngOnInit() 
 this.route.paramMap.subscribe(paramMap => 
 if (!paramMap.has('placeId')) 
 this.navCtrl.navigateBack('/places/tabs/discover');
 return;
 
 this.place = this.placesService.getplace(paramMap.get('placeId'));
 );
 

service.ts is where I wrote the getplace function:

getplace(id: number) 
 return ...this._places.find(
 p => p.id === id
 );
 

Model:

import Time from '@angular/common';
export class place 
 constructor(
 public id: number,
 public user_id: number,
 public title: string,
 public cooked_time: Date,
 public dispose_time: Date,
 public food_type: string,
 public description: string,
 public serve_quantity: number,
 public imageUrl: string,
 public lat: number,
 public long: number
 ) 

I am expecting to pass a number and that function is taking it as a string.

angular ionic-framework ionic4

share|improve this question

edited Mar 24 at 17:30

marc_s

592k13311321278

asked Mar 24 at 16:17

Pushpendra PalPushpendra Pal

237

ngOnInit() 
 this.route.paramMap.subscribe(paramMap => 
 if (!paramMap.has('placeId')) 
 this.navCtrl.navigateBack('/places/tabs/discover');
 return;
 
 this.place = this.placesService.getplace(paramMap.get('placeId'));
 );
 

getplace(id: number) 
 return ...this._places.find(
 p => p.id === id
 );
 

import Time from '@angular/common';
export class place 
 constructor(
 public id: number,
 public user_id: number,
 public title: string,
 public cooked_time: Date,
 public dispose_time: Date,
 public food_type: string,
 public description: string,
 public serve_quantity: number,
 public imageUrl: string,
 public lat: number,
 public long: number
 ) 

angular ionic-framework ionic4

angular ionic-framework ionic4

share|improve this question

edited Mar 24 at 17:30

marc_s

592k13311321278

asked Mar 24 at 16:17

Pushpendra PalPushpendra Pal

237

share|improve this question

edited Mar 24 at 17:30

marc_s

592k13311321278

asked Mar 24 at 16:17

Pushpendra PalPushpendra Pal

237

edited Mar 24 at 17:30

marc_s

592k13311321278

edited Mar 24 at 17:30

marc_s

592k13311321278

asked Mar 24 at 16:17

Pushpendra PalPushpendra Pal

237

asked Mar 24 at 16:17

Pushpendra PalPushpendra Pal

237

2 Answers
2

active

oldest

votes

1

use "+" in your call to

this.placesService.getplace(+paramMap.get('placeId')) 

to covert string to number

ngOnInit() 
 this.route.paramMap.subscribe(paramMap => 
 if (!paramMap.has('placeId')) 
 this.navCtrl.navigateBack('/places/tabs/discover');
 return;
 
 this.place = this.placesService.getplace(+paramMap.get('placeId'));
 );
 

share|improve this answer

answered Mar 24 at 17:17

Thivanka SaranathaThivanka Saranatha

1627

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks bro it works fine
  
  – Pushpendra Pal
  Mar 24 at 17:42
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I searched frantically for an answer why I kept getting a number when I wanted a string, and this "+" was the problem. Thanks, Thivanka!
  
  – JCQian
  Apr 16 at 18:31
  

  
  
  
  

add a comment | 

0

maybe something like this "bro" :)

ngOnInit() 
 this.route.paramMap.subscribe(paramMap => 
 if (!paramMap.has('placeId')) 
 this.navCtrl.navigateBack('/places/tabs/discover');
 return;
 
 this.place = this.placesService.getplace(<number>paramMap.get('placeId'));
 );
 

share|improve this answer

answered Mar 24 at 16:25

jcuypersjcuypers

1,40511119

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks bro it works fine
  
  – Pushpendra Pal
  Mar 24 at 17:43
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  while adding <number> tag just i have to add <unkown> tag and it takes number
  
  – Pushpendra Pal
  Mar 24 at 17:45
  

  
  
  
  

add a comment | 

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1

use "+" in your call to

this.placesService.getplace(+paramMap.get('placeId')) 

to covert string to number

ngOnInit() 
 this.route.paramMap.subscribe(paramMap => 
 if (!paramMap.has('placeId')) 
 this.navCtrl.navigateBack('/places/tabs/discover');
 return;
 
 this.place = this.placesService.getplace(+paramMap.get('placeId'));
 );
 

share|improve this answer

answered Mar 24 at 17:17

Thivanka SaranathaThivanka Saranatha

1627

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks bro it works fine
  
  – Pushpendra Pal
  Mar 24 at 17:42
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I searched frantically for an answer why I kept getting a number when I wanted a string, and this "+" was the problem. Thanks, Thivanka!
  
  – JCQian
  Apr 16 at 18:31
  

  
  
  
  

add a comment | 

1

use "+" in your call to

this.placesService.getplace(+paramMap.get('placeId')) 

to covert string to number

ngOnInit() 
 this.route.paramMap.subscribe(paramMap => 
 if (!paramMap.has('placeId')) 
 this.navCtrl.navigateBack('/places/tabs/discover');
 return;
 
 this.place = this.placesService.getplace(+paramMap.get('placeId'));
 );
 

share|improve this answer

answered Mar 24 at 17:17

Thivanka SaranathaThivanka Saranatha

1627

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks bro it works fine
  
  – Pushpendra Pal
  Mar 24 at 17:42
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I searched frantically for an answer why I kept getting a number when I wanted a string, and this "+" was the problem. Thanks, Thivanka!
  
  – JCQian
  Apr 16 at 18:31
  

  
  
  
  

add a comment | 

use "+" in your call to

this.placesService.getplace(+paramMap.get('placeId')) 

to covert string to number

ngOnInit() 
 this.route.paramMap.subscribe(paramMap => 
 if (!paramMap.has('placeId')) 
 this.navCtrl.navigateBack('/places/tabs/discover');
 return;
 
 this.place = this.placesService.getplace(+paramMap.get('placeId'));
 );
 

share|improve this answer

answered Mar 24 at 17:17

Thivanka SaranathaThivanka Saranatha

1627

this.placesService.getplace(+paramMap.get('placeId')) 

ngOnInit() 
 this.route.paramMap.subscribe(paramMap => 
 if (!paramMap.has('placeId')) 
 this.navCtrl.navigateBack('/places/tabs/discover');
 return;
 
 this.place = this.placesService.getplace(+paramMap.get('placeId'));
 );
 

share|improve this answer

answered Mar 24 at 17:17

Thivanka SaranathaThivanka Saranatha

1627

answered Mar 24 at 17:17

Thivanka SaranathaThivanka Saranatha

1627

answered Mar 24 at 17:17

Thivanka SaranathaThivanka Saranatha

1627

0

maybe something like this "bro" :)

ngOnInit() 
 this.route.paramMap.subscribe(paramMap => 
 if (!paramMap.has('placeId')) 
 this.navCtrl.navigateBack('/places/tabs/discover');
 return;
 
 this.place = this.placesService.getplace(<number>paramMap.get('placeId'));
 );
 

share|improve this answer

answered Mar 24 at 16:25

jcuypersjcuypers

1,40511119

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks bro it works fine
  
  – Pushpendra Pal
  Mar 24 at 17:43
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  while adding <number> tag just i have to add <unkown> tag and it takes number
  
  – Pushpendra Pal
  Mar 24 at 17:45
  

  
  
  
  

add a comment | 

0

maybe something like this "bro" :)

ngOnInit() 
 this.route.paramMap.subscribe(paramMap => 
 if (!paramMap.has('placeId')) 
 this.navCtrl.navigateBack('/places/tabs/discover');
 return;
 
 this.place = this.placesService.getplace(<number>paramMap.get('placeId'));
 );
 

share|improve this answer

answered Mar 24 at 16:25

jcuypersjcuypers

1,40511119

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks bro it works fine
  
  – Pushpendra Pal
  Mar 24 at 17:43
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  while adding <number> tag just i have to add <unkown> tag and it takes number
  
  – Pushpendra Pal
  Mar 24 at 17:45
  

  
  
  
  

add a comment | 

maybe something like this "bro" :)

ngOnInit() 
 this.route.paramMap.subscribe(paramMap => 
 if (!paramMap.has('placeId')) 
 this.navCtrl.navigateBack('/places/tabs/discover');
 return;
 
 this.place = this.placesService.getplace(<number>paramMap.get('placeId'));
 );
 

share|improve this answer

answered Mar 24 at 16:25

jcuypersjcuypers

1,40511119

ngOnInit() 
 this.route.paramMap.subscribe(paramMap => 
 if (!paramMap.has('placeId')) 
 this.navCtrl.navigateBack('/places/tabs/discover');
 return;
 
 this.place = this.placesService.getplace(<number>paramMap.get('placeId'));
 );
 

share|improve this answer

answered Mar 24 at 16:25

jcuypersjcuypers

1,40511119

answered Mar 24 at 16:25

jcuypersjcuypers

1,40511119

answered Mar 24 at 16:25

jcuypersjcuypers

1,40511119