Reset to a default if ngModel value no longer in list of dropdown options
I've got the following Component HTML Code
<label class="dropdown-list">
<select name="objektart" id="ddlPreisBis" class="form-control" [(ngModel)]="Filter.PreisMax">
<option value="">All</option>
<option *ngFor="let obj of PreisBis" [ngValue]="obj.Key">{{ obj.Name }}</option>
</select>
</label>
component.ts
PreisBis: Array<KeyNameModel<number>>;
Depending on other values, the items in "PreisBis" Array may change. If this happens and the value already selected in "Filter.Preismax" is no longer available in the PreisBis-Array, I want the empty option to be selected.
How can I achieve this? Currently no option is selected and the old selected value is still present in the model.
angular asked Nov 21 '18 at 10:55
MikeMike
9517
add a comment |
I've got the following Component HTML Code
<label class="dropdown-list">
<select name="objektart" id="ddlPreisBis" class="form-control" [(ngModel)]="Filter.PreisMax">
<option value="">All</option>
<option *ngFor="let obj of PreisBis" [ngValue]="obj.Key">{{ obj.Name }}</option>
</select>
</label>
component.ts
PreisBis: Array<KeyNameModel<number>>;
Depending on other values, the items in "PreisBis" Array may change. If this happens and the value already selected in "Filter.Preismax" is no longer available in the PreisBis-Array, I want the empty option to be selected.
How can I achieve this? Currently no option is selected and the old selected value is still present in the model.
angular asked Nov 21 '18 at 10:55
MikeMike
9517
how is yourPreisBisfetched ?
– CruelEngine
Nov 21 '18 at 10:57
@CruelEngine It is read by subscribing to an Observable (json request).
– Mike
Nov 21 '18 at 12:52
have you tried by settingFilter.PreisMax = ''?
– CruelEngine
Nov 21 '18 at 13:01
That would of course work, but i'm create a huge form with lots of dropdownlists like this one. With this approach i would have to check on every "PreisBis" Load, if the current PreisMax value has its representation in the array and if not reset the value. For 20+dropdowns this does not seem to the best approach
– Mike
Nov 21 '18 at 13:27
add a comment |
I've got the following Component HTML Code
<label class="dropdown-list">
<select name="objektart" id="ddlPreisBis" class="form-control" [(ngModel)]="Filter.PreisMax">
<option value="">All</option>
<option *ngFor="let obj of PreisBis" [ngValue]="obj.Key">{{ obj.Name }}</option>
</select>
</label>
component.ts
PreisBis: Array<KeyNameModel<number>>;
Depending on other values, the items in "PreisBis" Array may change. If this happens and the value already selected in "Filter.Preismax" is no longer available in the PreisBis-Array, I want the empty option to be selected.
How can I achieve this? Currently no option is selected and the old selected value is still present in the model.
angular asked Nov 21 '18 at 10:55
MikeMike
9517
I've got the following Component HTML Code
<label class="dropdown-list">
<select name="objektart" id="ddlPreisBis" class="form-control" [(ngModel)]="Filter.PreisMax">
<option value="">All</option>
<option *ngFor="let obj of PreisBis" [ngValue]="obj.Key">{{ obj.Name }}</option>
</select>
</label>
component.ts
PreisBis: Array<KeyNameModel<number>>;
Depending on other values, the items in "PreisBis" Array may change. If this happens and the value already selected in "Filter.Preismax" is no longer available in the PreisBis-Array, I want the empty option to be selected.
How can I achieve this? Currently no option is selected and the old selected value is still present in the model.
angular angular asked Nov 21 '18 at 10:55
MikeMike
9517
asked Nov 21 '18 at 10:55
MikeMike
9517
asked Nov 21 '18 at 10:55
MikeMike
9517
asked Nov 21 '18 at 10:55
MikeMike
9517
asked Nov 21 '18 at 10:55
MikeMike
9517
9517
how is yourPreisBisfetched ?
– CruelEngine
Nov 21 '18 at 10:57
@CruelEngine It is read by subscribing to an Observable (json request).
– Mike
Nov 21 '18 at 12:52
have you tried by settingFilter.PreisMax = ''?
– CruelEngine
Nov 21 '18 at 13:01
That would of course work, but i'm create a huge form with lots of dropdownlists like this one. With this approach i would have to check on every "PreisBis" Load, if the current PreisMax value has its representation in the array and if not reset the value. For 20+dropdowns this does not seem to the best approach
– Mike
Nov 21 '18 at 13:27
add a comment |
how is yourPreisBisfetched ?
– CruelEngine
Nov 21 '18 at 10:57
@CruelEngine It is read by subscribing to an Observable (json request).
– Mike
Nov 21 '18 at 12:52
have you tried by settingFilter.PreisMax = ''?
– CruelEngine
Nov 21 '18 at 13:01
That would of course work, but i'm create a huge form with lots of dropdownlists like this one. With this approach i would have to check on every "PreisBis" Load, if the current PreisMax value has its representation in the array and if not reset the value. For 20+dropdowns this does not seem to the best approach
– Mike
Nov 21 '18 at 13:27
how is your
PreisBis fetched ?– CruelEngine
Nov 21 '18 at 10:57
how is your
PreisBis fetched ?– CruelEngine
Nov 21 '18 at 10:57
@CruelEngine It is read by subscribing to an Observable (json request).
– Mike
Nov 21 '18 at 12:52
@CruelEngine It is read by subscribing to an Observable (json request).
– Mike
Nov 21 '18 at 12:52
have you tried by setting
Filter.PreisMax = '' ?– CruelEngine
Nov 21 '18 at 13:01
have you tried by setting
Filter.PreisMax = '' ?– CruelEngine
Nov 21 '18 at 13:01
That would of course work, but i'm create a huge form with lots of dropdownlists like this one. With this approach i would have to check on every "PreisBis" Load, if the current PreisMax value has its representation in the array and if not reset the value. For 20+dropdowns this does not seem to the best approach
– Mike
Nov 21 '18 at 13:27
That would of course work, but i'm create a huge form with lots of dropdownlists like this one. With this approach i would have to check on every "PreisBis" Load, if the current PreisMax value has its representation in the array and if not reset the value. For 20+dropdowns this does not seem to the best approach
– Mike
Nov 21 '18 at 13:27
add a comment |
1 Answer
1
active
oldest
votes
You can also use like,
<select class="form-control filter-control">
<option [value]=undefined>All</option>
<option value="equals">= Equals</option>
<option value="similar">Similar</option>
</select>
I think you had use wrong. All
because you have to always initiate model value using model.name = ''
answered Nov 21 '18 at 11:17
PradipPradip
1621310
add a comment |
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1 Answer
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oldest
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You can also use like,
<select class="form-control filter-control">
<option [value]=undefined>All</option>
<option value="equals">= Equals</option>
<option value="similar">Similar</option>
</select>
I think you had use wrong. All
because you have to always initiate model value using model.name = ''
answered Nov 21 '18 at 11:17
PradipPradip
1621310
add a comment |
You can also use like,
<select class="form-control filter-control">
<option [value]=undefined>All</option>
<option value="equals">= Equals</option>
<option value="similar">Similar</option>
</select>
I think you had use wrong. All
because you have to always initiate model value using model.name = ''
answered Nov 21 '18 at 11:17
PradipPradip
1621310
add a comment |
You can also use like,
<select class="form-control filter-control">
<option [value]=undefined>All</option>
<option value="equals">= Equals</option>
<option value="similar">Similar</option>
</select>
I think you had use wrong. All
because you have to always initiate model value using model.name = ''
answered Nov 21 '18 at 11:17
PradipPradip
1621310
You can also use like,
<select class="form-control filter-control">
<option [value]=undefined>All</option>
<option value="equals">= Equals</option>
<option value="similar">Similar</option>
</select>
I think you had use wrong. All
because you have to always initiate model value using model.name = ''
answered Nov 21 '18 at 11:17
PradipPradip
1621310
answered Nov 21 '18 at 11:17
PradipPradip
1621310
answered Nov 21 '18 at 11:17
PradipPradip
1621310
answered Nov 21 '18 at 11:17
PradipPradip
1621310
1621310
add a comment |
add a comment |
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how is your
PreisBisfetched ?– CruelEngine
Nov 21 '18 at 10:57
@CruelEngine It is read by subscribing to an Observable (json request).
– Mike
Nov 21 '18 at 12:52
have you tried by setting
Filter.PreisMax = ''?– CruelEngine
Nov 21 '18 at 13:01
That would of course work, but i'm create a huge form with lots of dropdownlists like this one. With this approach i would have to check on every "PreisBis" Load, if the current PreisMax value has its representation in the array and if not reset the value. For 20+dropdowns this does not seem to the best approach
– Mike
Nov 21 '18 at 13:27