Freetext search for a keyword which is also a common field name returns all records

[garethbowen]

Describe the bug

The search index indexes all documents by their fields, with an additional advanced feature of prefixing the search with the field name. For example, this doc:

{
  "name": "gareth"
}

Will by indexed by: "gareth", "name:gareth".

The idea is users can search for "name:gar" to ignore docs with a value starting with "garage" in another field. The problem is when someone searches for "nam" then every doc with a "name" field is returned.

To Reproduce
Steps to reproduce the behavior:

1. Go to Contacts tab
2. Search for "nam"
3. See all contacts returned

Expected behavior

Only a subset of contacts should be returned - those with a field value that starts with "nam".

Screenshots

Environment

• Instance: any
• Browser: any
• Client platform: any
• App: webapp
• Version: any

Additional context

Raised on the forum: https://forum.communityhealthtoolkit.org/t/unexpected-search-results/3288/16