不使用正则表达式的Parse.com用户搜索

Question

I have an app where I have users with a user name and a spot for their real name. I also allow users to query to find other users. Currently my query looks like this:

PFQuery *userQuery = [PFUser query];
[userQuery whereKey:kCPUserName containsString:[searchText lowercaseString]];

PFQuery *userRealNameQuery = [PFUser query];
[usernameQuery whereKey:kCPUserFullName containsString: searchText];

PFQuery *userRealNameWithCapsQuery = [PFUser query];
[userRealNameWithCapsQuery whereKey:kCPUserFullName containsString:[searchText capitalizedString]];

PFQuery *userRealNameWithLowerQuery = [PFUser query];
[userRealNameWithLowerQuery whereKey:kCPUserFullName containsString:[searchText lowercaseString]];

PFQuery *finalQuery = [PFQuery orQueryWithSubqueries:@[userQuery, userRealNameQuery, userRealNameWithCapsQuery, userRealNameWithLowerQuery]];

This works great, returning a list of users likely to match the searchText . However, I've become aware that containsString uses regex, thus if I have many users searching at the same time I quickly run into the 80 regex queries / min limitation in parse. Using hasPrefix: also uses regex. The only query I can think of would be to use the equalTo: method, but that would mean that a user must know exactly who they are looking for and how to spell their names (either user or real).

Any suggestions?

Answer 1

My final solution to this problem was to create a separate field, call it combined_names. This field is a concatenation of the real and user names (all lowercase). I can then do a single regex call on this and get the same results. While not removing all regex calls, it goes from 4 calls to 1.