WIP: feat: support json in WHERE clauses

lib/KnormPostgres.js

@@ -358,6 +358,30 @@ class KnormPostgres {
         return super.prepareSql(sql, options);
       }
 
+      getWhereColumnAndValue(where) {
+        const [fieldName, value] = where;
+        const field = this.config.fields[fieldName];
+
+        if (
+          (field.type !== 'json' && field.type !== 'jsonb') ||
+          typeof value !== 'object'
+        ) {
+          return super.getWhereColumnAndValue(where);
+        }
+
+        const entries = Object.entries(value);
+        const [[jsonKey, jsonValue]] = entries;
+
+        let column = this.getColumn(fieldName);
+        column = `${column}->'${jsonKey}'`;
+
+        if (field.type === 'json') {
+          column = `(${column})::jsonb`;
+        }
+
+        return [column, JSON.stringify(jsonValue)];
+      }
+
       // TODO: strict mode: warn/throw if a patch field is invalid
       // TODO: strict mode: warn/throw if a patch field is not a json(b) field
       isPatchedField(field) {