Resolving Error in Filter Parameters Due to Special Characters

This is a bit of a follow up to my earlier thread, i'm having an error in the filter parameters from what I assume are too many filters.

String ignore = StaticTSStrings.setBlockedUsers(user);
    String similar = StaticTSStrings.setSimilarUsers(user);

    final search = {
      'searches': [
        {
          'collection': 'users',
          'q': '*',
          'query_by': 'name',
          'page': '1',
          'per_page': '10',
          'sort_by': 'votes:desc',
          'filter_by': '($ignore) && ($similar) && finishedOnboarding:true'
        }
      ]
    };

The part that causes a problem is the $similar. Basically, it is a string formed from the following (apologies for the gross code):

static String setSimilarUsers(User user) {
    String similar = '';
    if (user.firstUndergrad != '') {
      similar += 'firstUndergrad:${user.firstUndergrad} || ';
    }
    if (user.secondUndergrad != '') {
      similar += 'secondUndergrad:${user.secondUndergrad} || ';
    }
    if (user.thirdUndergrad != '') {
      similar += 'thirdUndergrad:${user.thirdUndergrad} || ';
    }
    if (user.postGrad != '') {
      similar += 'postGrad:${user.postGrad} || ';
    }
    if (user.firstStudentOrg != '') {
      similar += 'firstStudentOrg:${user.firstStudentOrg} || ';
    }
    if (user.secondStudentOrg != '') {
      similar += 'secondStudentOrg:${user.secondStudentOrg} || ';
    }
    if (user.thirdStudentOrg != '') {
      similar += 'thirdStudentOrg:${user.thirdStudentOrg} || ';
    }
    if (user.fraternity != '') {
      similar += 'fraternity:!=\'\' || ';
    }
    if (user.favoriteBar != '') {
      similar += 'favoriteBar:${user.favoriteBar} || ';
    }
    if (user.favoriteSpot != '') {
      similar += 'favoriteSpot:${user.favoriteSpot} || ';
    }
    if (user.assosiatedDorm != '') {
      similar += 'assosiatedDorm:${user.assosiatedDorm} || ';
    }
    if (user.worstDorm != '') {
      similar += 'worstDorm:${user.worstDorm} || ';
    }
    if (user.intramuralSport != '') {
      similar += 'intramuralSport:${user.intramuralSport} || ';
    }

    //remove the last ' || ' if the string is not ''
    if (similar != '') {
      similar = similar.substring(0, similar.length - 4);
    }

    return similar;
  }

What this can end up producing is a single string that looks like:

firstUndergrad:Accounting || firstStudentOrg:Horticulture Club || fraternity:!='' || favoriteBar:House Parties(South Park) || favoriteSpot:None

and somewhere in that String, an error is being made. Specifically error code 400, '"error" -> "Could not parse the filter query."'. Am i doing something wrong?

👋 Are you using the 0.24 RC build?

Looks like that worked, thanks! But as a follow up to the previous thread, do you think large filters like this would impact the cluster at all?