完善合同气瓶绑定约束与候选过滤

- 明确合同状态、气瓶归属、停用、报废和重复绑定失败原因
- 根据当前合同过滤可绑定气瓶，排除无效及重复候选项
- 从合同列表进入绑定页时锁定预填合同，防止切换上下文
- 切换通用新建页合同后清空旧气瓶并重新加载候选项
- 增加前后端回归检查并同步中文操作日志

backend/api/internal/logic/platform/gasorder/contract_change_error_test.go

@@ -27,6 +27,22 @@ func TestContractChangeBusinessErrors(t *testing.T) {
 	}
 }
 
+// TestContractBindingErrorMessages 验证绑定失败时给出可操作的中文原因。
+func TestContractBindingErrorMessages(t *testing.T) {
+	want := map[error]string{
+		errBindingContractStatus:   "仅草稿合同可以绑定气瓶",
+		errBindingProductDisabled:  "所选气瓶已停用，不能绑定到合同",
+		errBindingProductScrapped:  "所选气瓶已报废，不能绑定到合同",
+		errBindingProductOwner:     "所选气瓶不属于该合同用户，请选择合同用户所属的气瓶",
+		errBindingProductDuplicate: "所选气瓶已绑定到该合同，请勿重复绑定",
+	}
+	for businessErr, message := range want {
+		if businessErr.Error() != message {
+			t.Fatalf("绑定错误提示不清晰：得到 %q，期望 %q", businessErr.Error(), message)
+		}
+	}
+}
+
 // TestContractActivationErrorMessages 验证关键启用失败原因保持清晰中文。
 func TestContractActivationErrorMessages(t *testing.T) {
 	want := map[error]string{

backend/api/internal/logic/platform/gasorder/gasorder.go

@@ -29,6 +29,11 @@ var (
 	errContractNotEffective    = errors.New("合同尚未到生效时间，暂时不能启用")
 	errContractExpired         = errors.New("合同已到期，请调整到期时间或续签后再启用")
 	errContractNoProduct       = errors.New("合同尚未绑定有效气瓶，请先绑定气瓶后再启用")
+	errBindingContractStatus   = errors.New("仅草稿合同可以绑定气瓶")
+	errBindingProductDisabled  = errors.New("所选气瓶已停用，不能绑定到合同")
+	errBindingProductScrapped  = errors.New("所选气瓶已报废，不能绑定到合同")
+	errBindingProductOwner     = errors.New("所选气瓶不属于该合同用户，请选择合同用户所属的气瓶")
+	errBindingProductDuplicate = errors.New("所选气瓶已绑定到该合同，请勿重复绑定")
 )
 
 func ListGasorderContract(ctx *gin.Context) { common.ListResource(ctx, &models.GasorderContract{}) }
@@ -424,14 +429,36 @@ func BindGasorderContractProduct(ctx *gin.Context) {
 		common.RespondRecordError(ctx, err)
 		return
 	}
-	if contract.ContractStatus != common.StatusDraft && contract.ContractStatus != common.StatusActive {
+	if contract.ContractStatus != common.StatusDraft {
-		infra.Response.Error(ctx, errcode.ErrInvalidArgument)
+		infra.Response.Error(ctx, errBindingContractStatus)
 		return
 	}
 	var product models.ProductInfo
-	if err := impl.DBService.Where("identity = ?", request.ProductIdentity).First(&product).Error; err != nil ||
+	if err := impl.DBService.Where("identity = ?", request.ProductIdentity).First(&product).Error; err != nil {
-		product.Status != common.StatusEnable || product.ProductStatus == common.StatusScrapped || product.UserAccountID != contract.UserAccountID {
+		common.RespondRecordError(ctx, err)
-		infra.Response.Error(ctx, errcode.ErrInvalidArgument)
+		return
+	}
+	if product.Status != common.StatusEnable {
+		infra.Response.Error(ctx, errBindingProductDisabled)
+		return
+	}
+	if product.ProductStatus == common.StatusScrapped {
+		infra.Response.Error(ctx, errBindingProductScrapped)
+		return
+	}
+	if product.UserAccountID != contract.UserAccountID {
+		infra.Response.Error(ctx, errBindingProductOwner)
+		return
+	}
+	var activeBindingCount int64
+	if err := impl.DBService.Model(&models.GasorderContractProduct{}).
+		Where("gasorder_contract_id = ? AND product_info_id = ? AND unbound_at IS NULL", contract.ID, product.ID).
+		Count(&activeBindingCount).Error; err != nil {
+		infra.Response.Error(ctx, err)
+		return
+	}
+	if activeBindingCount > 0 {
+		infra.Response.Error(ctx, errBindingProductDuplicate)
 		return
 	}
 	var productType models.ProductType

backend/api/internal/logic/platform/product/product.go

@@ -28,12 +28,31 @@ var productLifecycleStatuses = map[int]bool{
 
 func ProductInfoHandlers(relations ...common.ResourceRelation) (gin.HandlerFunc, gin.HandlerFunc, gin.HandlerFunc, gin.HandlerFunc) {
 	fields := []string{"code", "name", "params", "produced_at", "action", "reason", "remark"}
-	return func(ctx *gin.Context) { common.ListResource(ctx, &models.ProductInfo{}) },
+	return listProductInfo,
 		func(ctx *gin.Context) { createProductInfo(ctx, fields, relations) },
 		func(ctx *gin.Context) { common.GetResource(ctx, &models.ProductInfo{}) },
 		func(ctx *gin.Context) { updateProductInfo(ctx, fields, relations) }
 }
 
+// listProductInfo 按合同筛选可绑定气瓶；普通列表请求保持原有行为。
+func listProductInfo(ctx *gin.Context) {
+	contractIdentity := strings.TrimSpace(ctx.Query("contract_identity"))
+	if contractIdentity == "" {
+		common.ListResource(ctx, &models.ProductInfo{})
+		return
+	}
+	var contract models.GasorderContract
+	if err := impl.DBService.Where("identity = ?", contractIdentity).First(&contract).Error; err != nil {
+		common.RespondRecordError(ctx, err)
+		return
+	}
+	common.ListPageFiltered[models.ProductInfo](ctx, func(query *gorm.DB) *gorm.DB {
+		return query.
+			Where("status = ? AND product_status <> ? AND user_account_id = ?", common.StatusEnable, common.StatusScrapped, contract.UserAccountID).
+			Where("NOT EXISTS (SELECT 1 FROM gasorder_contract_product WHERE gasorder_contract_product.product_info_id = product_info.id AND gasorder_contract_product.gasorder_contract_id = ? AND gasorder_contract_product.unbound_at IS NULL)", contract.ID)
+	})
+}
+
 func createProductInfo(ctx *gin.Context, fields []string, relations []common.ResourceRelation) {
 	values, err := common.PrepareResourceValues(ctx, &models.ProductInfo{}, fields, relations)
 	if err != nil || !validParamsText(values["params"]) {

docs/操作日志_合同启用失败原因明确化_20260812.md

@@ -14,11 +14,16 @@
 - 终止非生效合同也返回明确状态原因。
 - 仅透传预定义业务错误；数据库及其他内部异常继续使用通用参数错误，避免泄露内部信息。
 - 增加业务错误白名单和中文消息回归测试。
+- 明确区分绑定气瓶时的合同状态、气瓶停用、气瓶报废、用户归属不一致和重复绑定原因。
+- 后端同步限制仅草稿合同允许绑定，与列表按钮可见规则保持一致。
+- 合同气瓶表单按当前合同过滤候选项，仅展示合同用户所属、已启用、未报废且未在该合同重复绑定的气瓶。
+- 切换合同时清空原气瓶并重新加载候选项；后端业务校验继续作为安全兜底。
 
 ## 行为变化
 
 - 变更前：所有启用前置条件失败均提示“请求参数不正确，请检查填写内容”。
 - 变更后：页面直接显示具体失败项及处理建议，例如“合同尚未绑定有效气瓶，请先绑定气瓶后再启用”。
+- 绑定失败时会提示具体处理原因，例如“所选气瓶不属于该合同用户，请选择合同用户所属的气瓶”。
 
 ## 代码变更
 

docs/操作日志_合同气瓶绑定入口_20260812.md

@@ -13,6 +13,7 @@
 - 在配送合同列表的操作列增加“绑定气瓶”按钮，仅草稿状态（`contract_status=0`）显示。
 - 合同已启用或处于其他非草稿状态时隐藏绑定按钮，详情页不再展示该入口。
 - 跳转合同气瓶新建页时，通过既有关系预填协议带入当前合同唯一标识。
+- 从合同列表行进入时锁定预填合同，以可读名称展示且禁止切换到其他合同；直接进入通用新建页时仍允许选择合同。
 - 携带当前详情页返回地址，使创建完成后可回到原合同。
 - 保留合同气瓶隐藏子路由、后端接口及权限模型，不改变现有公共接口。
 - 增加静态回归检查，固定入口展示范围、目标路由、合同预填字段和返回路径。

frontend/platform_admin/package.json

@@ -18,6 +18,7 @@
     "avatar-retry:check": "node scripts/check-avatar-upload-cache.mjs",
     "contract-attachment:check": "node scripts/check-contract-attachment-control.mjs",
     "contract-product-entry:check": "node scripts/check-contract-product-entry.mjs",
+    "contract-product-filter:check": "node scripts/check-contract-product-filter.mjs",
     "staff-organization:check": "node scripts/check-staff-organization-linkage.mjs",
     "staff-relations:check": "node scripts/check-staff-relation-policy.mjs",
     "user-address-display:check": "node scripts/check-user-address-relation-display.mjs",

frontend/platform_admin/scripts/check-contract-product-entry.mjs

@@ -13,6 +13,10 @@ const detailSource = readFileSync(
   new URL('../src/views/resource/ResourceRecordPage.vue', import.meta.url),
   'utf8',
 );
+const resourcesSource = readFileSync(
+  new URL('../src/api/resources.ts', import.meta.url),
+  'utf8',
+);
 
 assert.match(listSource, /definition\.name === 'gasorder_contract' && Number\(record\.contract_status\) === 0/, '绑定入口必须仅展示在草稿合同列表行');
 assert.match(listSource, />\s*绑定气瓶\s*</, '草稿合同操作列必须展示“绑定气瓶”按钮');
@@ -21,5 +25,7 @@ assert.match(listSource, /relation_key: 'gasorder_contract_identity'/, '绑定
 assert.match(listSource, /owner_identity: String\(row\.identity \?\? ''\)/, '绑定入口必须预填所选合同唯一标识');
 assert.match(listSource, /return_to: route\.fullPath/, '绑定完成后必须支持返回合同列表');
 assert.doesNotMatch(detailSource, />\s*绑定气瓶\s*</, '合同详情页不应继续展示绑定按钮');
+assert.match(detailSource, /definition\.value\.name === 'gasorder_contract_product'[\s\S]*field\.key === 'gasorder_contract_identity'[\s\S]*route\.query\.relation_key === 'gasorder_contract_identity'[\s\S]*Boolean\(route\.query\.owner_identity\)/, '从合同列表进入时必须锁定预填合同');
+assert.match(resourcesSource, /readonlyRelationText: true, displayRelationLabel: true/, '锁定合同必须以可读名称展示');
 
-console.log('合同气瓶绑定入口检查通过：仅草稿合同列表行可见，已启用合同和详情页均隐藏。');
+console.log('合同气瓶绑定入口检查通过：仅草稿合同列表行可见，进入后锁定所选合同。');

frontend/platform_admin/scripts/check-contract-product-filter.mjs

@@ -0,0 +1,15 @@
+/**
+ * 功能：检查合同气瓶表单按当前合同加载可绑定气瓶。
+ * 版本：v1.0.0
+ */
+import assert from 'node:assert/strict';
+import { readFileSync } from 'node:fs';
+
+const resources = readFileSync(new URL('../src/api/resources.ts', import.meta.url), 'utf8');
+const linkage = readFileSync(new URL('../src/views/resource/use-resource-relation-linkage.ts', import.meta.url), 'utf8');
+
+assert.match(resources, /filterKey: 'contract_identity', filterOnly: true/, '气瓶字段必须按当前合同筛选');
+assert.match(resources, /请先选择合同，再选择该合同用户可绑定的气瓶/, '气瓶字段必须解释筛选范围');
+assert.match(linkage, /if \(linkage\.filterOnly\) return ''/, '纯筛选联动不得执行父标识校验');
+
+console.log('合同气瓶候选过滤检查通过：气瓶下拉按当前合同加载可绑定项。');

frontend/platform_admin/src/api/resources.ts

@@ -31,6 +31,8 @@ export type ResourceRelationLinkage = {
   optionParentKey: string;
   filterKey: string;
   backfillParent?: boolean;
+  /** 仅使用父字段筛选候选项，不校验候选项中的父标识。 */
+  filterOnly?: boolean;
 };
 
 export type ResourceField = {
@@ -468,7 +470,15 @@ export const resources: ResourceUiDefinition[] = [
     { name: '续签合同', resource: '/gasorder_contract/:identity/renew', fields: [f('effective_at', { required: true }), f('expired_at'), ...reason], visibleFor: { field: 'contract_status', values: [11, 12] } },
     { name: '终止合同', resource: '/gasorder_contract/:identity/terminate', danger: true, fields: reason, visibleFor: { field: 'contract_status', values: [11] } },
   ], { canCreate: true, canEdit: true }),
-  define('gasorder_contract_product', '合同气瓶', 'append_only', [relation('gasorder_contract_identity', '/gasorder_contract', true), relation('product_info_identity', '/product_info', true), f('unit_price')], 'list', [
+  define('gasorder_contract_product', '合同气瓶', 'append_only', [relation('gasorder_contract_identity', '/gasorder_contract', true, {
+    readonlyRelationText: true, displayRelationLabel: true,
+  }), relation('product_info_identity', '/product_info', true, {
+    placeholder: '请先选择合同，再选择该合同用户可绑定的气瓶',
+    relationLinkage: {
+      parentKey: 'gasorder_contract_identity', optionParentKey: '',
+      filterKey: 'contract_identity', filterOnly: true,
+    },
+  }), f('unit_price')], 'list', [
     { name: '解绑气瓶', resource: '/gasorder_contract_product/:identity/unbind', danger: true, fields: reason },
   ]),
   define('gasorder_contract_revision', '合同修订记录', 'readonly', []),

frontend/platform_admin/src/views/resource/ResourceRecordPage.vue

@@ -301,7 +301,11 @@ const readonlyKeys = computed(() =>
         .filter(
           (field) =>
             field.readonlyOnCreate ||
-            (field.staffRelation?.lockPrefilled && Boolean(form[field.key])),
+            (field.staffRelation?.lockPrefilled && Boolean(form[field.key])) ||
+            (definition.value.name === 'gasorder_contract_product' &&
+              field.key === 'gasorder_contract_identity' &&
+              route.query.relation_key === 'gasorder_contract_identity' &&
+              Boolean(route.query.owner_identity)),
         )
         .map((field) => field.key)
     : mode.value === 'edit'

frontend/platform_admin/src/views/resource/use-resource-relation-linkage.ts

@@ -162,7 +162,11 @@ export function useResourceRelationLinkage(
       return;
     const linkage = active.childField.relationLinkage;
     const childIdentity = relationIdentity(form[active.childField.key]);
-    if (childIdentity) {
+    if (linkage.filterOnly && childIdentity) {
+      form[active.childField.key] = '';
+      Message.info('合同已变更，请重新选择该合同可绑定的气瓶');
+    }
+    if (childIdentity && !linkage.filterOnly) {
       const option =
         findOption(active.childField.relation, childIdentity) ??
         (await relations.ensure(active.childField.relation, childIdentity));
@@ -187,6 +191,7 @@ export function useResourceRelationLinkage(
       return;
     const linkage = active.childField.relationLinkage;
     if (!childIdentity) return;
+    if (linkage.filterOnly) return;
     const option =
       findOption(active.childField.relation, childIdentity) ??
       (await relations.ensure(active.childField.relation, childIdentity));
@@ -249,6 +254,7 @@ export function useResourceRelationLinkage(
     if (!active?.childField.relationLinkage || !active.childField.relation)
       return '';
     const linkage = active.childField.relationLinkage;
+    if (linkage.filterOnly) return '';
     const parentIdentity = relationIdentity(form[linkage.parentKey]);
     const childIdentity = relationIdentity(form[active.childField.key]);
     const option = findOption(active.childField.relation, childIdentity);