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116 lines
3.1 KiB
116 lines
3.1 KiB
{
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"properties" : { },
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"id" : "5e6f7a8490b1c2d3e4f5a678903",
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"script" : null,
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"groupId" : "f8e3d2c1b0a94e5f8a7b6c5d4e3f2a1",
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"name" : "活牛鲜肉价格趋势",
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"createTime" : 1780877200000,
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"updateTime" : null,
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"lock" : null,
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"createBy" : "admin",
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"updateBy" : "admin",
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"path" : "/price-trend",
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"method" : "GET",
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"parameters" : [ ],
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"options" : [ ],
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"requestBody" : "",
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"headers" : [ ],
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"paths" : [ ],
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"responseBody" : null,
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"description" : "活牛/鲜肉价格趋势：近8个月市场采集均价。数据源 yak_trade_market_price，活牛=LIVE_YAK，鲜肉=FRESH_MEAT，直接使用 price 字段及 unit 单位，不做重量折算。",
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"requestBodyDefinition" : null,
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"responseBodyDefinition" : null
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}
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================================
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// 只读查询，不修改任何数据
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// 数据源：yak_trade_market_price（市场采集价格，已含 price + unit）
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// price_type: LIVE_YAK=活牛, FRESH_MEAT=鲜肉/牛肉
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var monthBucketSql = """
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SELECT
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d.month_start,
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d.offs,
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TO_CHAR(d.month_start, 'FMMM') || '月' AS label
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FROM (
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SELECT
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(date_trunc('month', CURRENT_DATE) - (offs || ' months')::interval)::date AS month_start,
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offs
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FROM generate_series(7, 0, -1) AS offs
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) d
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ORDER BY d.offs DESC
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"""
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var livePriceSql = """
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SELECT
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date_trunc('month', p.price_date)::date AS month_start,
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ROUND(AVG(p.price)::numeric, 2) AS live_cattle_price
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FROM yak_trade_market_price p
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WHERE p.price_type = 'LIVE_YAK'
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AND p.price_date >= date_trunc('month', CURRENT_DATE) - INTERVAL '7 months'
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GROUP BY date_trunc('month', p.price_date)::date
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"""
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var beefPriceSql = """
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SELECT
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date_trunc('month', p.price_date)::date AS month_start,
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ROUND(AVG(p.price)::numeric, 2) AS beef_price
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FROM yak_trade_market_price p
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WHERE p.price_type = 'FRESH_MEAT'
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AND p.price_date >= date_trunc('month', CURRENT_DATE) - INTERVAL '7 months'
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GROUP BY date_trunc('month', p.price_date)::date
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"""
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var unitSql = """
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SELECT
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MAX(CASE WHEN price_type = 'LIVE_YAK' THEN unit END) AS live_unit,
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MAX(CASE WHEN price_type = 'FRESH_MEAT' THEN unit END) AS beef_unit
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FROM yak_trade_market_price
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WHERE price_type IN ('LIVE_YAK', 'FRESH_MEAT')
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"""
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var buckets = db.select(monthBucketSql)
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var liveRows = db.select(livePriceSql)
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var beefRows = db.select(beefPriceSql)
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var unitRows = db.select(unitSql)
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var liveMap = {}
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var beefMap = {}
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for (row in liveRows) {
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liveMap[row.monthStart] = row.liveCattlePrice
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}
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for (row in beefRows) {
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beefMap[row.monthStart] = row.beefPrice
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}
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var liveUnit = '元/公斤'
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var beefUnit = '元/公斤'
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if (unitRows && unitRows.length > 0) {
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if (unitRows[0].liveUnit) {
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liveUnit = unitRows[0].liveUnit
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}
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if (unitRows[0].beefUnit) {
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beefUnit = unitRows[0].beefUnit
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}
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}
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var labels = []
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var liveCattlePrice = []
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var beefPrice = []
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for (bucket in buckets) {
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var monthKey = bucket.monthStart
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labels.push(bucket.label)
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liveCattlePrice.push(liveMap[monthKey] != null ? liveMap[monthKey] : null)
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beefPrice.push(beefMap[monthKey] != null ? beefMap[monthKey] : null)
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}
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return {
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labels: labels,
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liveCattlePrice: liveCattlePrice,
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beefPrice: beefPrice,
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unit: liveUnit,
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liveUnit: liveUnit,
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beefUnit: beefUnit
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}
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