Question

我正在使用嵌套的Promises在before（）钩子中设置我的测试数据库。它运行良好，但我不知道如何在最高级别（在before（）钩子中）捕获错误。查看console.log，当在嵌套的Promise中捕获错误时，它将作为值返回到上一级...不匹配..

group.test.js

 before(() => {
   return utils.clearCollections()
     .then(() => {
       return utils.createSuperAdmin()
         .then(() => {
           return utils.createTestGroups(3)
             .then((insertedGroups) => {
               groups = insertedGroups;
               return utils.addRolesInGroups(groups)
                 .then((insertedRoles) => {
                   console.log('DONE ! %j', insertedRoles);
                 })
                 .catch((e) => {
                   console.log('error %j', e);
               });
             });
         });
     });
 });

test.utility.js

 export function addRolesInGroups(groups) {
     ...
    return Role.insertMany([roleA1, roleA2, roleA3, roleB2, roleB3, roleC3, role4 ])
        .then((insertedRoles) => {
          console.log('Successfully created test roles in groups');
          return insertedRoles;
        })
        .catch((e) => {
          console.log('Error inserting many: %j', e);
          return e;
      });
 }

的console.log

错误在Promise函数中被正确捕获 addRolesInGroups（） 但它被返回到调用before（）钩子..没有捕获......

Error inserting many: {"code":11000,"index":3,"errmsg":"E11000 
duplicate key error collection: cockpit-api-test.roles index: name_1 
dup key: { : \"manager\" }","op": "__v":0,
"_groupId":"5954d45e05206235d308f4d6",
"name":"manager","description":"can R group, can RW
 user","_id":"5954d45e05206235d308f4db","rolePermissions"
 [],"permissions":[{"resourceName":"group","authorizedActions"
 ["read"]},{"resourceName":"user","authorizedActions"
 ["read","write"]}],"users":[]}}

DONE ! {"code":11000,"index":3,"errmsg":"E11000 duplicate key error
collection: cockpit-api-test.roles index: name_1 
dup key: { : \"manager\" }","op"
{"__v":0,"_groupId":"5954d45e05206235d308f4d6",
"name":"manager","description":"can R group, can RW
user","_id":"5954d45e05206235d308f4db","rolePermissions":[],
"permissions":[{"resourceName":"group","authorizedActions":["read"]}
{"resourceName":"user","authorizedActions":["read","write"]}]
,"users":[]}}

Answer 1

这是因为您没有重新抛出缓存错误，而是返回了解决缓存错误的新Promise。将return e;更改为throw e;

node.js承诺如何在嵌套的Promises中处理最高调用级别的错误

1 个答案: