Constrain using CONTAINS filter always fails.

[DoryZi]

Contains will work well for srtings

When using contains constrain, it fails to detect that a entity_context parameter, actually contains the string.
We see that equal works fine, but contains seems to fail regardless of the value.

I.E.

"msg": "Literal is not a slice of string: \"http://localhost:8000/products/31982887829566/confirmation/?funnel=start&site=because&did=1732a3747268a-02f8335de7751d-1b396256-13c680-1732a374727189&variant=31982887829566&addons_before=true&product_position=2&product_position_variant=29600123486278&addons=&trial_addons=&utm_content=taboola\"",

I've also tried to simplify in case there is some url encoding going:

"msg": "Literal is not a slice of string: \"utm_content=taboola\""

My constrain in the simplest definition as
Property: evaluate_url
CONTAINS
Value: "utm_content"

Here is the test request I sent in the simplest form:

{
  "entityID": "a1234",
  "entityType": "report",
  "entityContext": {
    "evaluate_url": "utm_content=taboola"
    
  },
  "enableDebug": true,
  "flagID": 2,
  "flagKey": "*************"
}

Possible Solution

Not a go expect but I suspect that the way it's sliced and matches is incorrect.

Steps to Reproduce (for bugs)

• Setup a flag with constrain, as per my example above
• Run the test in the Flagr UI with debug. Equal works fine, contains always fails.

Context

Your Environment

• Version used (flagr version):
• Server type and version:
• Operating System and version (uname -a):
• Link to your project:

[zhouzhuojie]

Related link: zhouzhuojie/conditions#11 (comment)

CONTAINS only works for [array] contains item, if you want substring, the regex operator =~ can help.

[DoryZi]

Thanks! Amazing work on Flagr!