Bug 2224010

Description of problem:
Sometimes, quoted string (consisting of some field's name) is interpreted as a field's bool value. Sometimes, it's not. For example, "snippet" translates to "all entries where snipped field is set to true", BUT "!snippet" translates to "all entries where some field contains string '!snippet'". This is inconsistent.

Version-Release number of selected component (if applicable):
Sat 6.14, behavior allowed by fixing bug 1949960.

How reproducible:
Deterministic

Steps to Reproduce:
Searching in Hosts -> Provisioning templates:
0) snippet => all snippets
1) !snippet => all non-snippets
2) "snippet" => somewhat counter-intuitively all snippets but I could let this pass
3) "!snippet" => nothing, only would return whatever contains "!snippet" in its content - this is inconsistent with 2) where "snippet" is interpreted as "value of 'snippet' field is true"
4) name ~ snippet => all templates that contain "snippet" in their content
5) default => snippets with "default" in their content
6) default_template => templates marked as default
7) "default" => same as 5)
8) "default_template" => same as 6)
9) default_template = true => same as 7)
10) "!default_template" => nothing, again inconsistently with 8), the same issue as with 3)

Actual results:
2) and 3), 10) and 8) are inconsistent.

Expected results:
Both should be either translated to "field's bool value is true/false " or "string contained in fields" (IMO preferrably, since quotes are used).

Additional info:
According to aruzicka, this is an issue in scoped_search. The bug manifests in our product, though, and we even have Search component so I'm reporting it here.