Check for empty observable object
up vote
0
down vote
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I have this html-tamplate
<div *ngIf="results$ | async; else notFound">
...
</div>
<ng-template #notFound>
<div>
<h2>Not found</h2>
</div>
</ng-template>
results$ is an Observable object, which is initialized in component and contains 3 different arrays. How can I check whether my $results is empty(actually check if all of arrays in this object empty) in
*ngIf
so in template will be shown.
<ng-template #notFound>
angular
asked Nov 22 at 15:46
hlibOstapenko
111
add a comment |
up vote
0
down vote
favorite
I have this html-tamplate
<div *ngIf="results$ | async; else notFound">
...
</div>
<ng-template #notFound>
<div>
<h2>Not found</h2>
</div>
</ng-template>
results$ is an Observable object, which is initialized in component and contains 3 different arrays. How can I check whether my $results is empty(actually check if all of arrays in this object empty) in
*ngIf
so in template will be shown.
<ng-template #notFound>
angular
asked Nov 22 at 15:46
hlibOstapenko
111
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I have this html-tamplate
<div *ngIf="results$ | async; else notFound">
...
</div>
<ng-template #notFound>
<div>
<h2>Not found</h2>
</div>
</ng-template>
results$ is an Observable object, which is initialized in component and contains 3 different arrays. How can I check whether my $results is empty(actually check if all of arrays in this object empty) in
*ngIf
so in template will be shown.
<ng-template #notFound>
angular
asked Nov 22 at 15:46
hlibOstapenko
111
I have this html-tamplate
<div *ngIf="results$ | async; else notFound">
...
</div>
<ng-template #notFound>
<div>
<h2>Not found</h2>
</div>
</ng-template>
results$ is an Observable object, which is initialized in component and contains 3 different arrays. How can I check whether my $results is empty(actually check if all of arrays in this object empty) in
*ngIf
so in template will be shown.
<ng-template #notFound>
angular
angular
asked Nov 22 at 15:46
hlibOstapenko
111
asked Nov 22 at 15:46
hlibOstapenko
111
asked Nov 22 at 15:46
hlibOstapenko
111
asked Nov 22 at 15:46
hlibOstapenko
111
asked Nov 22 at 15:46
hlibOstapenko
111
111
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
up vote
1
down vote
<div *ngIf="results$ | async as threeArrays>
<div *ngIf="!allArraysAreEmpty(threeArrays); else allArraysEmpty">
...
</div>
<ng-template #allArraysEmpty>
<div>
<h2>All 3 arrays are empty</h2>
</div>
</ng-template>
</div>
answered Nov 22 at 15:51
JB Nizet
533k51857992
This is not working for me. Says that allArraysAreEmpty is not a function. Is there any other possible variants to solve my problem? I`m kind of new in Angular. Thank you.
– hlibOstapenko
Nov 22 at 17:28
Yes, of course, you need to write that method in your component. That should be trivial if you know what the actual type of the threeArrays variable is (we don't: we just know that it's something that has 3 arrays).
– JB Nizet
Nov 22 at 17:30
Yeah, of course it's custom function :). Thanks a lot, problem is resolved
– hlibOstapenko
Nov 22 at 20:54
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
<div *ngIf="results$ | async as threeArrays>
<div *ngIf="!allArraysAreEmpty(threeArrays); else allArraysEmpty">
...
</div>
<ng-template #allArraysEmpty>
<div>
<h2>All 3 arrays are empty</h2>
</div>
</ng-template>
</div>
answered Nov 22 at 15:51
JB Nizet
533k51857992
This is not working for me. Says that allArraysAreEmpty is not a function. Is there any other possible variants to solve my problem? I`m kind of new in Angular. Thank you.
– hlibOstapenko
Nov 22 at 17:28
Yes, of course, you need to write that method in your component. That should be trivial if you know what the actual type of the threeArrays variable is (we don't: we just know that it's something that has 3 arrays).
– JB Nizet
Nov 22 at 17:30
Yeah, of course it's custom function :). Thanks a lot, problem is resolved
– hlibOstapenko
Nov 22 at 20:54
add a comment |
up vote
1
down vote
<div *ngIf="results$ | async as threeArrays>
<div *ngIf="!allArraysAreEmpty(threeArrays); else allArraysEmpty">
...
</div>
<ng-template #allArraysEmpty>
<div>
<h2>All 3 arrays are empty</h2>
</div>
</ng-template>
</div>
answered Nov 22 at 15:51
JB Nizet
533k51857992
This is not working for me. Says that allArraysAreEmpty is not a function. Is there any other possible variants to solve my problem? I`m kind of new in Angular. Thank you.
– hlibOstapenko
Nov 22 at 17:28
Yes, of course, you need to write that method in your component. That should be trivial if you know what the actual type of the threeArrays variable is (we don't: we just know that it's something that has 3 arrays).
– JB Nizet
Nov 22 at 17:30
Yeah, of course it's custom function :). Thanks a lot, problem is resolved
– hlibOstapenko
Nov 22 at 20:54
add a comment |
up vote
1
down vote
up vote
1
down vote
<div *ngIf="results$ | async as threeArrays>
<div *ngIf="!allArraysAreEmpty(threeArrays); else allArraysEmpty">
...
</div>
<ng-template #allArraysEmpty>
<div>
<h2>All 3 arrays are empty</h2>
</div>
</ng-template>
</div>
answered Nov 22 at 15:51
JB Nizet
533k51857992
<div *ngIf="results$ | async as threeArrays>
<div *ngIf="!allArraysAreEmpty(threeArrays); else allArraysEmpty">
...
</div>
<ng-template #allArraysEmpty>
<div>
<h2>All 3 arrays are empty</h2>
</div>
</ng-template>
</div>
answered Nov 22 at 15:51
JB Nizet
533k51857992
answered Nov 22 at 15:51
JB Nizet
533k51857992
answered Nov 22 at 15:51
JB Nizet
533k51857992
answered Nov 22 at 15:51
JB Nizet
533k51857992
533k51857992
This is not working for me. Says that allArraysAreEmpty is not a function. Is there any other possible variants to solve my problem? I`m kind of new in Angular. Thank you.
– hlibOstapenko
Nov 22 at 17:28
Yes, of course, you need to write that method in your component. That should be trivial if you know what the actual type of the threeArrays variable is (we don't: we just know that it's something that has 3 arrays).
– JB Nizet
Nov 22 at 17:30
Yeah, of course it's custom function :). Thanks a lot, problem is resolved
– hlibOstapenko
Nov 22 at 20:54
add a comment |
This is not working for me. Says that allArraysAreEmpty is not a function. Is there any other possible variants to solve my problem? I`m kind of new in Angular. Thank you.
– hlibOstapenko
Nov 22 at 17:28
Yes, of course, you need to write that method in your component. That should be trivial if you know what the actual type of the threeArrays variable is (we don't: we just know that it's something that has 3 arrays).
– JB Nizet
Nov 22 at 17:30
Yeah, of course it's custom function :). Thanks a lot, problem is resolved
– hlibOstapenko
Nov 22 at 20:54
This is not working for me. Says that allArraysAreEmpty is not a function. Is there any other possible variants to solve my problem? I`m kind of new in Angular. Thank you.
– hlibOstapenko
Nov 22 at 17:28
This is not working for me. Says that allArraysAreEmpty is not a function. Is there any other possible variants to solve my problem? I`m kind of new in Angular. Thank you.
– hlibOstapenko
Nov 22 at 17:28
Yes, of course, you need to write that method in your component. That should be trivial if you know what the actual type of the threeArrays variable is (we don't: we just know that it's something that has 3 arrays).
– JB Nizet
Nov 22 at 17:30
Yes, of course, you need to write that method in your component. That should be trivial if you know what the actual type of the threeArrays variable is (we don't: we just know that it's something that has 3 arrays).
– JB Nizet
Nov 22 at 17:30
Yeah, of course it's custom function :). Thanks a lot, problem is resolved
– hlibOstapenko
Nov 22 at 20:54
Yeah, of course it's custom function :). Thanks a lot, problem is resolved
– hlibOstapenko
Nov 22 at 20:54
add a comment |
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