Javascript Express Node.JS-接收Redis回调，执行承诺_Javascript_Node.js_Express_Redis_Node Redis

Javascript Express Node.JS-接收Redis回调，执行承诺

javascript node.js express redis

Javascript Express Node.JS-接收Redis回调，执行承诺,javascript,node.js,express,redis,node-redis,Javascript,Node.js,Express,Redis,Node Redis,我有一个Node/Express路由函数，它在另一个模块中执行Redis调用。我想在一个节点模块中执行一个复杂的Redis函数，并发送一个简单的回调，告诉路由模块这是成功的。Redis调用将执行，但我无法执行任何同步函数，即使从Redis调用中检索一个简单的真值。以下是我的Redis功能： doctorDB.js var addDoctor = function addDoctor(id, doc){ var fields = Object.keys(doc.fields);

我有一个Node/Express路由函数，它在另一个模块中执行Redis调用。我想在一个节点模块中执行一个复杂的Redis函数，并发送一个简单的回调，告诉路由模块这是成功的。Redis调用将执行，但我无法执行任何同步函数，即使从Redis调用中检索一个简单的真值。以下是我的Redis功能：

doctorDB.js

var addDoctor = function addDoctor(id, doc){

    var fields = Object.keys(doc.fields);

    return client.multi()
        .sadd("Doctors", id)
        .hmset(id, "lastName", doc.lastName, "firstName", doc.firstName)
        .hmset(id, "email", doc.email, "university", doc.university, "work", doc.work)
        .sadd(id + ":fields", fields)
        .exec(function(err, replies){
            console.log("It's in this");
            if (doc.middleName){
                console.log("Now here");
                client.hset(id, "middleName", doc.middleName);
                return true;
            } else {
                console.log("Or here");
                return true;
            }                       
        }); 
};

app.post('/addDoctorInfo',  ensureLoggedIn('/login'), function(req, res, next){

    // function getThis(req){
    //  var deferred = Q.defer();

    //  doctorDB.addDoctor(req.body.id, req.body.doc).then(function(response){
    //      deferred.resolve(response);
    //  }, function(err){
    //      console.log(err);
    //      return deferred.resolve(err);
    //  });
    //  return deferred.promise;
    // }

    // var x = getThis(req);
    // console.log(x);

    doctorDB.addDoctor(req.body.id, req.body.doc).then(function(x){
        console.log(x);
    }).catch(function(err){
        console.log(err);
    }).finally(function(){
        console.log("We made it!");
    });


    // function sendMsg(info){
    //  console.log(info);
    //  res.send({success: true});
    // }
    // async.waterfall([
    //  doctorDB.addDoctor(req.body.id, req.body.doc),
    //  sendMsg(info)
    // ], function(err){
    //  console.log(err)
    // });

    // var DBCALL = doctorDB.addDoctor(req.body.id, req.body.doc);

    // Q.fcall(DBCALL).then(function(x){
    //  return console.log(x);
    // }).catch(function(err){
    //  console.log(err);
    // });
});

app.post('/addDoctorInfo', ensureLoggedIn('/login'), function(req, res, next){
        return doctorDB.addDoctor(req.body.id, req.body.doc, req, res, next);
});

var addDoctor = function addDoctor(id, doc, req, res, next){
    var fields = Object.keys(doc.fields);

    function middleName(id, doc){
        if (doc.middleName){ return client.hset(id, "middleName", doc.middleName); }
        else { return; }
    }

    return Q.all([Q.ninvoke(client, 'sadd', 'Doctors', id),
                    Q.ninvoke(client, 'hmset', id, "lastName", doc.lastName, "firstName", doc.firstName, "email", doc.email, "university", doc.university, "work", doc.work),
                    Q.ninvoke(client, 'sadd', id + ':fields', fields),
                    middleName(id, doc)]).then(function(x){
                        return getInfo(id, req, res, next);;
                    }, function (err) { res.status(404); });
};

一切都在为此而努力。现在，我希望将回调发送到Express路由器，以便向客户端发送响应。我希望它是一个同步函数的形式，我已经尝试了很多使用Q和Async的方法，但是没有任何效果。所以要么A.我没有完全掌握承诺函数，要么B.我没有完全掌握将值返回到另一个模块。任何帮助都将不胜感激

以下是express router端的许多失败尝试，仅供参考：

routes.js

var addDoctor = function addDoctor(id, doc){

    var fields = Object.keys(doc.fields);

    return client.multi()
        .sadd("Doctors", id)
        .hmset(id, "lastName", doc.lastName, "firstName", doc.firstName)
        .hmset(id, "email", doc.email, "university", doc.university, "work", doc.work)
        .sadd(id + ":fields", fields)
        .exec(function(err, replies){
            console.log("It's in this");
            if (doc.middleName){
                console.log("Now here");
                client.hset(id, "middleName", doc.middleName);
                return true;
            } else {
                console.log("Or here");
                return true;
            }                       
        }); 
};

app.post('/addDoctorInfo',  ensureLoggedIn('/login'), function(req, res, next){

    // function getThis(req){
    //  var deferred = Q.defer();

    //  doctorDB.addDoctor(req.body.id, req.body.doc).then(function(response){
    //      deferred.resolve(response);
    //  }, function(err){
    //      console.log(err);
    //      return deferred.resolve(err);
    //  });
    //  return deferred.promise;
    // }

    // var x = getThis(req);
    // console.log(x);

    doctorDB.addDoctor(req.body.id, req.body.doc).then(function(x){
        console.log(x);
    }).catch(function(err){
        console.log(err);
    }).finally(function(){
        console.log("We made it!");
    });


    // function sendMsg(info){
    //  console.log(info);
    //  res.send({success: true});
    // }
    // async.waterfall([
    //  doctorDB.addDoctor(req.body.id, req.body.doc),
    //  sendMsg(info)
    // ], function(err){
    //  console.log(err)
    // });

    // var DBCALL = doctorDB.addDoctor(req.body.id, req.body.doc);

    // Q.fcall(DBCALL).then(function(x){
    //  return console.log(x);
    // }).catch(function(err){
    //  console.log(err);
    // });
});

app.post('/addDoctorInfo', ensureLoggedIn('/login'), function(req, res, next){
        return doctorDB.addDoctor(req.body.id, req.body.doc, req, res, next);
});

var addDoctor = function addDoctor(id, doc, req, res, next){
    var fields = Object.keys(doc.fields);

    function middleName(id, doc){
        if (doc.middleName){ return client.hset(id, "middleName", doc.middleName); }
        else { return; }
    }

    return Q.all([Q.ninvoke(client, 'sadd', 'Doctors', id),
                    Q.ninvoke(client, 'hmset', id, "lastName", doc.lastName, "firstName", doc.firstName, "email", doc.email, "university", doc.university, "work", doc.work),
                    Q.ninvoke(client, 'sadd', id + ':fields', fields),
                    middleName(id, doc)]).then(function(x){
                        return getInfo(id, req, res, next);;
                    }, function (err) { res.status(404); });
};

我明白了。我使用Q库来执行所有函数，而不是client.multi（）.exec（）。这允许干净地执行所有redispost命令，然后允许我检索信息

在routes.js文件中，我只有一小段代码。一切都在doctorDB.js文件中执行

routes.js

var addDoctor = function addDoctor(id, doc){

    var fields = Object.keys(doc.fields);

    return client.multi()
        .sadd("Doctors", id)
        .hmset(id, "lastName", doc.lastName, "firstName", doc.firstName)
        .hmset(id, "email", doc.email, "university", doc.university, "work", doc.work)
        .sadd(id + ":fields", fields)
        .exec(function(err, replies){
            console.log("It's in this");
            if (doc.middleName){
                console.log("Now here");
                client.hset(id, "middleName", doc.middleName);
                return true;
            } else {
                console.log("Or here");
                return true;
            }                       
        }); 
};

app.post('/addDoctorInfo',  ensureLoggedIn('/login'), function(req, res, next){

    // function getThis(req){
    //  var deferred = Q.defer();

    //  doctorDB.addDoctor(req.body.id, req.body.doc).then(function(response){
    //      deferred.resolve(response);
    //  }, function(err){
    //      console.log(err);
    //      return deferred.resolve(err);
    //  });
    //  return deferred.promise;
    // }

    // var x = getThis(req);
    // console.log(x);

    doctorDB.addDoctor(req.body.id, req.body.doc).then(function(x){
        console.log(x);
    }).catch(function(err){
        console.log(err);
    }).finally(function(){
        console.log("We made it!");
    });


    // function sendMsg(info){
    //  console.log(info);
    //  res.send({success: true});
    // }
    // async.waterfall([
    //  doctorDB.addDoctor(req.body.id, req.body.doc),
    //  sendMsg(info)
    // ], function(err){
    //  console.log(err)
    // });

    // var DBCALL = doctorDB.addDoctor(req.body.id, req.body.doc);

    // Q.fcall(DBCALL).then(function(x){
    //  return console.log(x);
    // }).catch(function(err){
    //  console.log(err);
    // });
});

app.post('/addDoctorInfo', ensureLoggedIn('/login'), function(req, res, next){
        return doctorDB.addDoctor(req.body.id, req.body.doc, req, res, next);
});

var addDoctor = function addDoctor(id, doc, req, res, next){
    var fields = Object.keys(doc.fields);

    function middleName(id, doc){
        if (doc.middleName){ return client.hset(id, "middleName", doc.middleName); }
        else { return; }
    }

    return Q.all([Q.ninvoke(client, 'sadd', 'Doctors', id),
                    Q.ninvoke(client, 'hmset', id, "lastName", doc.lastName, "firstName", doc.firstName, "email", doc.email, "university", doc.university, "work", doc.work),
                    Q.ninvoke(client, 'sadd', id + ':fields', fields),
                    middleName(id, doc)]).then(function(x){
                        return getInfo(id, req, res, next);;
                    }, function (err) { res.status(404); });
};

doctorDB.js

var addDoctor = function addDoctor(id, doc){

    var fields = Object.keys(doc.fields);

    return client.multi()
        .sadd("Doctors", id)
        .hmset(id, "lastName", doc.lastName, "firstName", doc.firstName)
        .hmset(id, "email", doc.email, "university", doc.university, "work", doc.work)
        .sadd(id + ":fields", fields)
        .exec(function(err, replies){
            console.log("It's in this");
            if (doc.middleName){
                console.log("Now here");
                client.hset(id, "middleName", doc.middleName);
                return true;
            } else {
                console.log("Or here");
                return true;
            }                       
        }); 
};

app.post('/addDoctorInfo',  ensureLoggedIn('/login'), function(req, res, next){

    // function getThis(req){
    //  var deferred = Q.defer();

    //  doctorDB.addDoctor(req.body.id, req.body.doc).then(function(response){
    //      deferred.resolve(response);
    //  }, function(err){
    //      console.log(err);
    //      return deferred.resolve(err);
    //  });
    //  return deferred.promise;
    // }

    // var x = getThis(req);
    // console.log(x);

    doctorDB.addDoctor(req.body.id, req.body.doc).then(function(x){
        console.log(x);
    }).catch(function(err){
        console.log(err);
    }).finally(function(){
        console.log("We made it!");
    });


    // function sendMsg(info){
    //  console.log(info);
    //  res.send({success: true});
    // }
    // async.waterfall([
    //  doctorDB.addDoctor(req.body.id, req.body.doc),
    //  sendMsg(info)
    // ], function(err){
    //  console.log(err)
    // });

    // var DBCALL = doctorDB.addDoctor(req.body.id, req.body.doc);

    // Q.fcall(DBCALL).then(function(x){
    //  return console.log(x);
    // }).catch(function(err){
    //  console.log(err);
    // });
});

app.post('/addDoctorInfo', ensureLoggedIn('/login'), function(req, res, next){
        return doctorDB.addDoctor(req.body.id, req.body.doc, req, res, next);
});

var addDoctor = function addDoctor(id, doc, req, res, next){
    var fields = Object.keys(doc.fields);

    function middleName(id, doc){
        if (doc.middleName){ return client.hset(id, "middleName", doc.middleName); }
        else { return; }
    }

    return Q.all([Q.ninvoke(client, 'sadd', 'Doctors', id),
                    Q.ninvoke(client, 'hmset', id, "lastName", doc.lastName, "firstName", doc.firstName, "email", doc.email, "university", doc.university, "work", doc.work),
                    Q.ninvoke(client, 'sadd', id + ':fields', fields),
                    middleName(id, doc)]).then(function(x){
                        return getInfo(id, req, res, next);;
                    }, function (err) { res.status(404); });
};

这将传递给函数getInfo（），该函数将向客户端发送响应：

var redisHGetAll = Q.nbind(client.hgetall, client);

var getInfo = function getInfo(id, req, res, next){
    return redisHGetAll(id).then(function(x){
        return findByMatchingProperties(x);
    }, function (err) { res.status(404); }).then(function(){
        return client.smembers(id + ':fields', function(err, reply){
            data['fields'] = reply;
            res.setHeader('Content-Type', 'application/json');
            res.end(JSON.stringify(data));
        });
    }, function (err) { res.status(404); })
};

function findByMatchingProperties(x) {
    for (var y in x){
        checkData(y, x[y]);
    }       

    function checkData(y, z){
        for (var d in data){
            if (d === y){
                data[d] = z;
            }
        }
    }
}

var data = {
    lastName: null,
    firstName: null,
    middleName: null,
    email: null,
    university: null,
    work: null,
    fields: null
};

我明白了。我使用Q库来执行所有函数，而不是client.multi（）.exec（）。这允许干净地执行所有redispost命令，然后允许我检索信息

在routes.js文件中，我只有一小段代码。一切都在doctorDB.js文件中执行

routes.js

var addDoctor = function addDoctor(id, doc){

    var fields = Object.keys(doc.fields);

    return client.multi()
        .sadd("Doctors", id)
        .hmset(id, "lastName", doc.lastName, "firstName", doc.firstName)
        .hmset(id, "email", doc.email, "university", doc.university, "work", doc.work)
        .sadd(id + ":fields", fields)
        .exec(function(err, replies){
            console.log("It's in this");
            if (doc.middleName){
                console.log("Now here");
                client.hset(id, "middleName", doc.middleName);
                return true;
            } else {
                console.log("Or here");
                return true;
            }                       
        }); 
};

app.post('/addDoctorInfo',  ensureLoggedIn('/login'), function(req, res, next){

    // function getThis(req){
    //  var deferred = Q.defer();

    //  doctorDB.addDoctor(req.body.id, req.body.doc).then(function(response){
    //      deferred.resolve(response);
    //  }, function(err){
    //      console.log(err);
    //      return deferred.resolve(err);
    //  });
    //  return deferred.promise;
    // }

    // var x = getThis(req);
    // console.log(x);

    doctorDB.addDoctor(req.body.id, req.body.doc).then(function(x){
        console.log(x);
    }).catch(function(err){
        console.log(err);
    }).finally(function(){
        console.log("We made it!");
    });


    // function sendMsg(info){
    //  console.log(info);
    //  res.send({success: true});
    // }
    // async.waterfall([
    //  doctorDB.addDoctor(req.body.id, req.body.doc),
    //  sendMsg(info)
    // ], function(err){
    //  console.log(err)
    // });

    // var DBCALL = doctorDB.addDoctor(req.body.id, req.body.doc);

    // Q.fcall(DBCALL).then(function(x){
    //  return console.log(x);
    // }).catch(function(err){
    //  console.log(err);
    // });
});

app.post('/addDoctorInfo', ensureLoggedIn('/login'), function(req, res, next){
        return doctorDB.addDoctor(req.body.id, req.body.doc, req, res, next);
});

var addDoctor = function addDoctor(id, doc, req, res, next){
    var fields = Object.keys(doc.fields);

    function middleName(id, doc){
        if (doc.middleName){ return client.hset(id, "middleName", doc.middleName); }
        else { return; }
    }

    return Q.all([Q.ninvoke(client, 'sadd', 'Doctors', id),
                    Q.ninvoke(client, 'hmset', id, "lastName", doc.lastName, "firstName", doc.firstName, "email", doc.email, "university", doc.university, "work", doc.work),
                    Q.ninvoke(client, 'sadd', id + ':fields', fields),
                    middleName(id, doc)]).then(function(x){
                        return getInfo(id, req, res, next);;
                    }, function (err) { res.status(404); });
};

doctorDB.js

var addDoctor = function addDoctor(id, doc){

    var fields = Object.keys(doc.fields);

    return client.multi()
        .sadd("Doctors", id)
        .hmset(id, "lastName", doc.lastName, "firstName", doc.firstName)
        .hmset(id, "email", doc.email, "university", doc.university, "work", doc.work)
        .sadd(id + ":fields", fields)
        .exec(function(err, replies){
            console.log("It's in this");
            if (doc.middleName){
                console.log("Now here");
                client.hset(id, "middleName", doc.middleName);
                return true;
            } else {
                console.log("Or here");
                return true;
            }                       
        }); 
};

app.post('/addDoctorInfo',  ensureLoggedIn('/login'), function(req, res, next){

    // function getThis(req){
    //  var deferred = Q.defer();

    //  doctorDB.addDoctor(req.body.id, req.body.doc).then(function(response){
    //      deferred.resolve(response);
    //  }, function(err){
    //      console.log(err);
    //      return deferred.resolve(err);
    //  });
    //  return deferred.promise;
    // }

    // var x = getThis(req);
    // console.log(x);

    doctorDB.addDoctor(req.body.id, req.body.doc).then(function(x){
        console.log(x);
    }).catch(function(err){
        console.log(err);
    }).finally(function(){
        console.log("We made it!");
    });


    // function sendMsg(info){
    //  console.log(info);
    //  res.send({success: true});
    // }
    // async.waterfall([
    //  doctorDB.addDoctor(req.body.id, req.body.doc),
    //  sendMsg(info)
    // ], function(err){
    //  console.log(err)
    // });

    // var DBCALL = doctorDB.addDoctor(req.body.id, req.body.doc);

    // Q.fcall(DBCALL).then(function(x){
    //  return console.log(x);
    // }).catch(function(err){
    //  console.log(err);
    // });
});

app.post('/addDoctorInfo', ensureLoggedIn('/login'), function(req, res, next){
        return doctorDB.addDoctor(req.body.id, req.body.doc, req, res, next);
});

var addDoctor = function addDoctor(id, doc, req, res, next){
    var fields = Object.keys(doc.fields);

    function middleName(id, doc){
        if (doc.middleName){ return client.hset(id, "middleName", doc.middleName); }
        else { return; }
    }

    return Q.all([Q.ninvoke(client, 'sadd', 'Doctors', id),
                    Q.ninvoke(client, 'hmset', id, "lastName", doc.lastName, "firstName", doc.firstName, "email", doc.email, "university", doc.university, "work", doc.work),
                    Q.ninvoke(client, 'sadd', id + ':fields', fields),
                    middleName(id, doc)]).then(function(x){
                        return getInfo(id, req, res, next);;
                    }, function (err) { res.status(404); });
};

这将传递给函数getInfo（），该函数将向客户端发送响应：

var redisHGetAll = Q.nbind(client.hgetall, client);

var getInfo = function getInfo(id, req, res, next){
    return redisHGetAll(id).then(function(x){
        return findByMatchingProperties(x);
    }, function (err) { res.status(404); }).then(function(){
        return client.smembers(id + ':fields', function(err, reply){
            data['fields'] = reply;
            res.setHeader('Content-Type', 'application/json');
            res.end(JSON.stringify(data));
        });
    }, function (err) { res.status(404); })
};

function findByMatchingProperties(x) {
    for (var y in x){
        checkData(y, x[y]);
    }       

    function checkData(y, z){
        for (var d in data){
            if (d === y){
                data[d] = z;
            }
        }
    }
}

var data = {
    lastName: null,
    firstName: null,
    middleName: null,
    email: null,
    university: null,
    work: null,
    fields: null
};