Railway•2y ago

mongodb's collections data can't display on my webpage.

After import a json file, collections have a contacts . when I use "docker run" command, my localhost/contacts don't display any data.

30 Replies

Percy•2y ago

Project ID: c7cb0789-9eba-454f-8499-d7ee14e026af

AulyOP•2y ago

c7cb0789-9eba-454f-8499-d7ee14e026af have anyone here?

Brody•2y ago

are you passing in the mongodb environment variables to the docker run command?

AulyOP•2y ago

yes, I use "docker run -p 8080:8080 -e PORT=8080 -e MONGODB_URI="mongodb://mongo:[email protected]:7978" hello_crow:latest " And my localhost:8080 display a html fine. @Brody are you still here?

Brody•2y ago

you have to stop with the spam pings

AulyOP•2y ago

what relation with spam pings?

Brody•2y ago

#🛂｜readme #5

AulyOP•2y ago

I am sorry for you. but could you continue help sloving my question?

Brody•2y ago

chill

AulyOP•2y ago

ok, my english is not so good. anyway, why contacts under collections do not display on webpage?

Brody•2y ago

usually the environment variable is called MONGO_URL so use that, both in the command line args and in your code

AulyOP•2y ago

yes. in main.cpp, use below commands get contacts:

mongocxx::instance inst{};
string mongoConnect=std::string(getenv("MONGODB_URI"));
mongocxx::client conn{mongocxx::uri{mongoConnect}};
auto collection=conn["containers-us-west-175.railway.app:7978"]["contacts"];

mongocxx::instance inst{};
string mongoConnect=std::string(getenv("MONGODB_URI"));
mongocxx::client conn{mongocxx::uri{mongoConnect}};
auto collection=conn["containers-us-west-175.railway.app:7978"]["contacts"];

and use these commands to server contacts page:

    CROW_ROUTE(app, "/contacts")
    ([&collection]()
    {
        mongocxx::options::find opts;
        opts.limit(10);
        auto docs=collection.find({}, opts);
        std::ostringstream os;
       for (auto&& doc : docs)
        {
                os<<bsoncxx::to_json(doc)<<endl;
        }
        return crow::response(os.str());
    });

    CROW_ROUTE(app, "/contacts")
    ([&collection]()
    {
        mongocxx::options::find opts;
        opts.limit(10);
        auto docs=collection.find({}, opts);
        std::ostringstream os;
       for (auto&& doc : docs)
        {
                os<<bsoncxx::to_json(doc)<<endl;
        }
        return crow::response(os.str());
    });

Brody•2y ago

why do you have a hardcoded host and port

AulyOP•2y ago

i write it according a course, when open 8080 port, the page can display, otherwise, it can't display.

Brody•2y ago

does this work on localhost?

AulyOP•2y ago

yes, localhost:8080 and localhost:8080/about have a page.

Brody•2y ago

show me a screenshot of your railway service variables

AulyOP•2y ago

Brody•2y ago

AulyOP•2y ago

so i should only have MONGO_URL.

Brody•2y ago

your code is not using MONGO_URL

AulyOP•2y ago

please more in detail

Brody•2y ago

your code is not using the MONGO_URL environment variable

AulyOP•2y ago

so i should change string mongoConnect=std::string(getenv("MONGODB_URI")); to MONGODB_URL? and delete other variables?

Brody•2y ago

i understand english is not your first language, so please read over my message carefully

AulyOP•2y ago

ok, change to MONGO_URL

Brody•2y ago

yes

AulyOP•2y ago

thank you so much.this issue trouble me one day. bye.

Brody•2y ago

your app works on railway now?

AulyOP•2y ago

yes, it works after I change getenv and conn[][].I don't know what 's string after '@' in MONGO_URL? I am wrong with conn[string afer@][].

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mongodb's collections data can't display on my webpage.