es plainess脚本如何获取nested的值

像这样两级嵌套，我想plainess脚本获取到date和price的值怎么获取。
以为我想进行price进行聚合，聚合出这些商品的价格区间
mapping结构：

"price": {

				"type": "nested",

				"properties": {

					"sales_org_id": {

						"type": "long"

					},

					"bundle_sub_product": {

						"type": "boolean"

					},

					"date_price": {

						"type": "nested",

						"properties": {

							"date": {

								"type": "keyword"

							},

							"deal_id": {

								"type": "long"

							},

							"discount_percentage": {

								"type": "long"

							},

							"bundle_product_id": {

								"type": "long"

							},

							"base_price": {

								"type": "float"

							},

							"price": {

								"type": "float"

							},

							"member_price": {

								"type": "float"

							},

							"trade_in_price": {

								"type": "float"

							},

							"max_order_quantity": {

								"type": "long"

							},

							"min_order_quantity": {

								"type": "long"

							},

							"product_feature": {

								"type": "long"

							},

							"product_sold_count": {

								"type": "long"

							},

							"special_info": {

								"properties": {

									"base_price": {

										"type": "float"

									},

									"special_price": {

										"type": "float"

									},

									"member_price": {

										"type": "float"

									},

									"special_status": {

										"type": "keyword"

									},

									"special_start_time": {

										"type": "keyword"

									},

									"special_end_time": {

										"type": "keyword"

									}

								}

							}

						}

					}

				}

			}

		}