I wonder that how creating Firebase matchesRegex query and listing current results using shouldChangeTextInRange.
I have did it before in Parse for searching username or user fullname in Parse Cloud. If someone shed light my path to do it in Firebase, it would be great.
// search updated
func searchBar(searchBar: UISearchBar, shouldChangeTextInRange range: NSRange, replacementText text: String) -> Bool {
// find by username
let usernameQuery = PFQuery(className: "_User")
usernameQuery.whereKey("username", matchesRegex: "(?i)" + searchBar.text!)
usernameQuery.findObjectsInBackgroundWithBlock { (objects:[PFObject]?, error:NSError?) -> Void in
if error == nil {
// if no objects are found according to entered text in username column, find by fullname
if objects!.isEmpty {
let fullnameQuery = PFUser.query()
fullnameQuery?.whereKey("fullname", matchesRegex: "(?i)" + self.searchBar.text!)
fullnameQuery?.findObjectsInBackgroundWithBlock({ (objects:[PFObject]?, error:NSError?) -> Void in
if error == nil {
// clean up
self.usernameArray.removeAll(keepCapacity: false)
self.avaArray.removeAll(keepCapacity: false)
// found related objects
for object in objects! {
self.usernameArray.append(object.objectForKey("username") as! String)
self.avaArray.append(object.objectForKey("avatar") as! PFFile)
}
// reload
self.tableView.reloadData()
}
})
}
}
// clean up
self.usernameArray.removeAll(keepCapacity: false)
self.avaArray.removeAll(keepCapacity: false)
// found related objects
for object in objects! {
self.usernameArray.append(object.objectForKey("username") as! String)
self.avaArray.append(object.objectForKey("avatar") as! PFFile)
}
// reload
self.tableView.reloadData()
}
return true
}
Update 1:
I couldn't do it using same parent name, snap.value didn't give me response, even not compile. So I have tried to do two separate parent node like that: firebase screen shot link
I'm getting indexOn security warning for each letter stroke first_name subnodes on xcode console:
[Firebase] Using an unspecified index. Consider adding ".indexOn": "first_name/T" at /people_spell to your security rules for better performance
[Firebase] Using an unspecified index. Consider adding ".indexOn": "first_name/Te" at /people_spell to your security rules for better performance
... much more times
I have tried these security rules it didn't solve these problems. It doesn't encompass each subnodes. How Can I provide this?
"people_spell": {
".read": "auth !== null",
".write": "auth !== null",
".indexOn": "first_name"
},
"people": {
".read": "auth !== null",
".write": "auth !== null",
".indexOn": "first_name"
}
I'm using these lines of codes:
let peopleSpellRef = Firebase(url: "https://sampleproject.firebaseio.com/people_spell")
let peopleRef = Firebase(url: "https://sampleproject.firebaseio.com/people")
func searchBar(searchBar: UISearchBar, shouldChangeTextInRange range: NSRange, replacementText text: String) -> Bool {
self.usernameArray.removeAll(keepCapacity: false)
peopleSpellRef.queryOrderedByChild("first_name/(searchBar.text!)").queryEqualToValue(true)
.observeEventType(.Value, withBlock: { snapshot in
let enumerator = snapshot.children
while let rest = enumerator.nextObject() as? FDataSnapshot {
peopleRef.childByAppendingPath("(rest.key)").observeEventType(.Value, withBlock: { snapshot in
self.usernameArray.removeAll(keepCapacity: false)
let str: String = (snapshot.value.objectForKey("first_name")) as! (String)
print(str)
self.usernameArray.append(str)
self.userkeyArray.append(snapshot.key)
self.tableView.reloadData()
})
}
self.usernameArray.removeAll(keepCapacity: false)
self.tableView.reloadData()
})
return true
}
See Question&Answers more detail:
os 
