I'm trying to pull out a value for a nested object key from some eligibility array that I've got, but I'm getting an undefined value for some reason and need to know what I'm missing.
Given the following array:
const eligibilityCriteria = [
{ field: 'loan.amount', operator: '>=', value: 1000 },
{ field: 'loan.term', operator: '>=', value: 1 },
{ field: 'applicant.birthday', operator: '>=', value: 40 },
{ field: 'applicant.isHomeowner', operator: '==', value: false }
]
I need to find loan.amount from a nested object and pull out it's value:
My big nested object is (coming from the store)
application: {
meta: {
brand: '',
version: '',
affiliate: '',
affiliate_full: '',
campaign: '',
client_hostname: '',
client_href: '',
client_origin: '',
client_useragent: '',
client_ip: '127.0.0.1',
icicle_hash: ''
},
loan: {
amount: 500,
term: null,
purpose: null
}
}
My function right now is:
checkEligibility () {
const eligibilityCriteria = [
{ field: 'loan.amount', operator: '>=', value: 1000 },
{ field: 'loan.term', operator: '>=', value: 1 },
{ field: 'applicant.birthday', operator: '>=', value: 40 },
{ field: 'applicant.isHomeowner', operator: '==', value: false }
]
for (const [index, offer] of this.datasets.offers.entries()) {
const eligibility = eligibilityCriteria
if (eligibility) {
for (const [ci, criteria] of eligibility.entries()) {
// TODO: this fails to pull the value, returns undefined
const field = _.findKey(this.$store.state.application.application, criteria.field)
}
}
}
}
What am I missing?
You must have to misunderstood what _.findKey() does
This method is like _.find except that it returns the key of the first element predicate returns truthy for instead of the element itself.
See Example 2 in the code below.
If you want to retrieve the value from the object at a given path, you must use _.property() (Example 2 below)
const eligibilityCriteria = [
{ field: 'loan.amount', operator: '>=', value: 1000 },
{ field: 'loan.term', operator: '>=', value: 1 },
]
const application = {
loan: {
amount: 500,
term: 2,
amount2: 0,
}
}
// example 1
// outputs "loan"
console.log(_.findKey(application, "amount"))
// outputs undefined - there is no key in application object that has property chain "loan.amount"
console.log(_.findKey(application, "loan.amount"))
// outputs undefined - "amount2" key is there but the value is falsy
console.log(_.findKey(application, "amount2"))
// example 2
for (const [ci, criteria] of eligibilityCriteria.entries()) {
console.log(criteria.field, _.property(criteria.field)(application))
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