Implement arr_contains for PostgreSQL

Author: AJCStriker

package.json

@@ -1,6 +1,6 @@
 {
   "name": "strontium",
-  "version": "2.9.4",
+  "version": "2.9.5",
   "description": "Strontium is a TypeScript toolkit for High Performance API servers built for Production not Projects.",
   "main": "lib/src/index.js",
   "types": "lib/src/index.d.ts",

src/query/abstract/Filter.ts

@@ -12,6 +12,7 @@ export type FieldFilter<P extends keyof T, T> =
           $lt?: T[P]
           $lte?: T[P]
           $contains?: T[P]
+          $arr_contains?: Array<T[P]>
       }
     | T[P]
 

src/query/drivers/sql/SQLFilterCompiler.ts

@@ -80,6 +80,9 @@ export const compileSQLFilter: FilterCompiler<[string, Array<any>]> = (
             queries.push(["?? <= ?", [field, subquery.$lte]])
         } else if (subquery.$contains !== undefined) {
             queries.push(["?? LIKE ?", [field, `%${subquery.$contains}%`]])
+        } else if (subquery.$arr_cotains !== undefined) {
+            // This implementation is currently unique to PostgreSQL - We should consider how to add similar functionality to MySQL
+            queries.push(["?? @> ?", [field, subquery.$arr_cotains]])
         } else if (subquery.$eq !== undefined) {
             queries.push(["?? = ?", [field, subquery.$eq]])
         } else {

src/validation/drivers/validators/isFilter.ts

@@ -46,5 +46,6 @@ const isFieldSelector = (keyValidator: ValidatorFunction<any, any>) =>
             $lt: either(isUndefined, keyValidator),
             $lte: either(isUndefined, keyValidator),
             $contains: either(isUndefined, keyValidator),
+            $arr_contains: either(isUndefined, isArray(keyValidator)),
         })
     )