Google Firestore: Query on substring of a property value (text search)

Question

I am looking to add a simple search field, would like to use something like

collectionRef.where(\'name\', \'contains\', \'searchTerm\')

I tried

Answer 1

I'm sure Firebase will come out with "string-contains" soon to capture any index[i] startAt in the string... But I’ve researched the webs and found this solution thought of by someone else set up your data like this

state = {title:"Knitting"}
...
const c = this.state.title.toLowerCase()

var array = [];
for (let i = 1; i < c.length + 1; i++) {
 array.push(c.substring(0, i));
}

firebase
.firestore()
.collection("clubs")
.doc(documentId)
.update({
 title: this.state.title,
 titleAsArray: array
})

query like this

firebase
.firestore()
.collection("clubs")
.where(
 "titleAsArray",
 "array-contains",
 this.state.userQuery.toLowerCase()
)