问题
How to search for a string in all properties of an object in Angular 2 with TS.
I have an array of customers rendered in a table with a search box, if the user types a value I want to search for all properties values to push a customer that matches the value typed.
export var CUSTOMER: Client[] = [
{ id: 1, name: 'John', phone: '888-888-888'},
{ id: 2, name: 'Nick', phone: '555-888-888'},
{ id: 3, name: 'Mike', phone: '666-888-888'},
];
The Filter Pipe
import {Pipe, PipeTransform, Injectable} from "@angular/core";
@Pipe({
name: 'filter',
pure: false
})
@Injectable()
export class Ng2SearchPipe implements PipeTransform {
transform(items: any, term: any): any {
if (term === undefined) {
return items;
}
return items.filter(function(item){
return item.name.toLowerCase().includes(term.toLowerCase());
});
}
}
In the filter pipe above I can only search by the name. I'm not sure how to approach this. Should I create a method for the Customer object that returns all property values concatenated and then search for the term on this concatenated value?
回答1:
You need to apply null check and use .toString()
otherwise if value will be number it will not be able to use toLowerCase()
method and will raise error.
return items.filter(item =>
Object.keys(item).some(
k =>
item[k] != null &&
item[k]
.toString()
.toLowerCase()
.includes(term.toLowerCase())
)
);
回答2:
You can loop over the keys of the item and see if any of them include the string, and return true if any number of them match:
return items.filter(item =>
Object.keys(item).some(k => item[k].includes(term.toLowerCase());
)
来源:https://stackoverflow.com/questions/41901643/search-for-a-string-in-all-properties-of-an-object-in-angular-2