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Add length operator #1439

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Add length operator #1439

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db77c4b
Add $length operator to ConditionalRouter for array length comparisons
Smirl Nov 18, 2025
2938868
Add comprehensive tests for $length operator in ConditionalRouter
Smirl Nov 18, 2025
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15 changes: 15 additions & 0 deletions src/services/conditionalRouter.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,7 @@ enum Operator {
In = '$in',
NotIn = '$nin',
Regex = '$regex',
Length = '$length',

// Logical Operators
And = '$and',
Expand Down Expand Up @@ -125,6 +126,20 @@ export class ConditionalRouter {
} catch (e) {
return false;
}
case Operator.Length:
if (!Array.isArray(value)) return false;
// compareValue could be a number or an object like {$gt: 5}
if (typeof compareValue === 'number') {
if (value.length !== compareValue) return false;
} else if (
typeof compareValue === 'object' &&
compareValue !== null
) {
// Recursively evaluate the length with other operators
if (!this.evaluateOperator(compareValue, value.length))
return false;
}
break;
default:
throw new Error(
`Unsupported operator used in the query router: ${op}`
Expand Down
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