CacheControl / CacheControl/json-rules-engine

Question: Comparing Distinct Arrays of Objects

Open
#258 5 comments 2 reactions 0 assignees View on GitHub
Dominant language
JavaScript
Stars
3.1k
Forks
507
PR merge metrics
No merged PRs in 30d

Description

Hello,

I am trying to compare an array of objects to check for a specific set of objects to be present in any of them, but not across all of them, specifically lets take this rule:
```
const arrayRule = {
conditions: {
any: [
{
all: [
{
fact: 'data',
path: '$.[*].equalityTest',
operator: 'equal',
value: 50,
},
{
fact: 'data',
path: '$.[*].anotherTest',
operator: 'equal',
value: 50,
},
],
},
],
},
event: {
type: 'arrayRule',
},
};
```

This is the first iteration of the rule I came up with, it is incorrect, but I wanted to give an idea of what I am aiming for.

Specifically here, we have a rule where I want `equalityTest` to equal `50` and `anotherTest` to also equal `50`. But I want them to equal those values in the same object, such that:
*THIS SHOULD RETURN FALSE*
```
const facts = {
data: [
{
anotherIntegerFact: 1,
equalityTest: 50,
},
{
anotherIntegerFact: 50,
equalityTest: 40,
},
],
};
```

*THIS SHOULD RETURN TRUE*
```
const facts = {
data: [
{
anotherIntegerFact: 50,
equalityTest: 50,
},
{
anotherIntegerFact: 40,
equalityTest: 40,
},
],
};
```

Would love any suggestions or ideas on a way to tackle this. One thought was I could write my own `operator` and add it to the registry of operators on our end, but before I did so, I wanted to validate that is needed.

Thanks

Contributor guide

No contributing guide indexed for this repository

Research direction

No file or test entry point is named. Start by reviewing the rule condition and operator registry around array-path evaluation; use the two supplied facts examples to define completion as same-object matching returning false for the first and true for the second.

Written by the indexing model from the issue text.

Assessment

Tech stack
javascript
Domain
backend
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
20/100

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.