rule

{ "rules_test_2" : {
    "LABEL" : "test 2",
    "PLUGIN" : "reaction rule",
    "OWNER" : "rules",
    "REQUIRES" : [ "rules" ],
    "ON" : { "user_insert" : [] },
    "DO" : [
      { "entity_query" : {
          "USING" : {
            "type" : "user",
            "property" : "field_passager_id",
            "value" : [ "account:field-passager-id" ],
            "limit" : "100"
          },
          "PROVIDE" : { "entity_fetched" : { "entity_fetched" : "Fetched entity" } }
        }
      },
      { "LOOP" : {
          "USING" : { "list" : [ "entity-fetched" ] },
          "ITEM" : { "list_item" : "Current list item" },
          "DO" : [
            { "data_set" : { "data" : [ "list-item:field-passeur-io" ], "value" : "0" } }
          ]
        }
      },
      { "data_set" : { "data" : [ "account:field-passeur-io" ], "value" : "1" } }
    ]
  }
}