15 lines
461 B
JavaScript
15 lines
461 B
JavaScript
import { computed } from '@ember/object';
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// An Ember.Computed property for summating all properties from a
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// set of objects.
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//
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// ex. list: [ { foo: 1 }, { foo: 3 } ]
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// sum: sumAggregationProperty('list', 'foo') // 4
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export default function sumAggregationProperty(listKey, propKey) {
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return computed(`${listKey}.@each.${propKey}`, function() {
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return this.get(listKey)
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.mapBy(propKey)
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.reduce((sum, count) => sum + count, 0);
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});
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}
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