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Commit06bfa7c

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author
tsv2013
committed
Implemented no-sql CRUD adapter for MongoDB
1 parent6bc7944 commit06bfa7c

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9 files changed

+77
-707
lines changed

9 files changed

+77
-707
lines changed

‎express-app/db-adapters/mongo.js‎

Lines changed: 18 additions & 14 deletions
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,5 @@
11
constfs=require("fs");
2+
const{ MongoClient, ObjectId}=require('mongodb');
23
constNoSQLCRUDAdapter=require("./nosql-crud-adapter");
34
constSurveyStorage=require("./survey-storage");
45

@@ -14,25 +15,28 @@ const dbConfig = {
1415
:null
1516
};
1617

17-
constMongoClient=require('mongodb').MongoClient;
1818
consturl=`mongodb://${dbConfig.user}:${dbConfig.password}@${dbConfig.host}:${dbConfig.port}/`;
19-
console.log(url);
19+
// console.log(url);
20+
constclient=newMongoClient(url);
2021

2122
functionMongoStorage(session){
22-
functiondbConnectFunction(callback){
23-
MongoClient.connect(url,function(err,db){
24-
if(err)throwerr;
25-
vardbo=db.db(dbConfig.database);
26-
callback(dbo,()=>{
27-
db.close();
28-
if(!process.env.DATABASE_LOG){
29-
console.log(arguments[0]);
30-
console.log(arguments[1]);
31-
}
23+
functiondbConnectFunction(dbCallback){
24+
client.connect()
25+
.then(()=>{
26+
constdb=client.db(dbConfig.database);
27+
dbCallback(db,function(){
28+
if(!!process.env.DATABASE_LOG){
29+
console.log(arguments[0]);
30+
console.log(arguments[1]);
31+
}
32+
client.close();
33+
});
34+
})
35+
.catch(()=>{
36+
console.error(JSON.stringify(arguments));
3237
});
33-
});
3438
}
35-
constdbQueryAdapter=newNoSQLCRUDAdapter(dbConnectFunction);
39+
constdbQueryAdapter=newNoSQLCRUDAdapter(dbConnectFunction,()=>newObjectId().toString());
3640
returnnewSurveyStorage(dbQueryAdapter);
3741
}
3842

‎express-app/db-adapters/nosql-crud-adapter.js‎

Lines changed: 45 additions & 49 deletions
Original file line numberDiff line numberDiff line change
@@ -1,66 +1,62 @@
1-
functionNoSQLCRUDAdapter(dbConnectFunction){
1+
functionNoSQLCRUDAdapter(dbConnectFunction,getId){
22
functiongetObjects(collectionName,filter,callback){
33
filter=filter||[];
44
letquery={};
55
filter.forEach(fi=>query[fi.name]=fi.value);
6-
dbConnectFunction((dbo,finalizeCallback)=>
7-
dbo.collection(collectionName).find(query).toArray((error,results)=>{
8-
finalizeCallback();
9-
if(error){
10-
throwerror;
11-
}
12-
callback(results);
13-
})
6+
dbConnectFunction((db,finalizeCallback)=>{
7+
db.collection(collectionName).find(query).toArray()
8+
.then((results)=>{
9+
callback(results);
10+
finalizeCallback(results);
11+
})
12+
.catch(()=>{
13+
console.error(JSON.stringify(arguments));
14+
});
15+
}
1416
);
1517
}
1618

17-
functiondeleteObject(tableName,idValue,callback){
18-
constcommand="DELETE FROM "+tableName+" WHERE id='"+idValue+"'";
19-
dbConnectFunction(command,(error,results)=>{
20-
if(error){
21-
throwerror;
19+
functiondeleteObject(collectionName,idValue,callback){
20+
dbConnectFunction((db,finalizeCallback)=>{
21+
db.collection(collectionName).deleteMany({id:idValue})
22+
.then((results)=>{
23+
callback(results);
24+
finalizeCallback(results);
25+
})
26+
.catch(()=>{
27+
console.error(JSON.stringify(arguments));
28+
});
2229
}
23-
callback(results);
24-
});
30+
);
2531
}
2632

27-
functioncreateObject(tableName,object,callback){
28-
constvalueNames=[];
29-
constvalueIndexes=[];
30-
constvalues=[];
31-
Object.keys(object).forEach((key,index)=>{
32-
if(object[key]!==undefined){
33-
valueNames.push(key);
34-
valueIndexes.push("$"+(index+1));
35-
values.push(object[key]);
36-
}
37-
});
38-
constcommand="INSERT INTO "+tableName+" ("+valueNames.join(", ")+") VALUES ("+valueIndexes.join(", ")+") RETURNING id";
39-
dbConnectFunction(command,values,(error,results)=>{
40-
if(error){
41-
throwerror;
33+
functioncreateObject(collectionName,object,callback){
34+
object.id=object.id||getId();
35+
dbConnectFunction((db,finalizeCallback)=>{
36+
db.collection(collectionName).insertOne(object)
37+
.then((results)=>{
38+
callback(object.id);
39+
finalizeCallback(results);
40+
})
41+
.catch(()=>{
42+
console.error(JSON.stringify(arguments));
43+
});
4244
}
43-
// console.log(JSON.stringify(results));
44-
callback(results.rows[0].id);
45-
});
45+
);
4646
}
4747

48-
functionupdateObject(tableName,object,callback){
49-
constvalueNames=[];
50-
constvalues=[];
51-
Object.keys(object).forEach((key,index)=>{
52-
if(object[key]!==undefined){
53-
valueNames.push(key+" = $"+(index+1));
54-
values.push(object[key]);
55-
}
56-
});
57-
constcommand="UPDATE "+tableName+" SET "+valueNames.join(", ")+" WHERE id = '"+object.id+"'";
58-
dbConnectFunction(command,values,(error,results)=>{
59-
if(error){
60-
throwerror;
48+
functionupdateObject(collectionName,object,callback){
49+
dbConnectFunction((db,finalizeCallback)=>{
50+
db.collection(collectionName).updateOne({id:object.id},{$set:object})
51+
.then((results)=>{
52+
callback(results);
53+
finalizeCallback(results);
54+
})
55+
.catch(()=>{
56+
console.error(JSON.stringify(arguments));
57+
});
6158
}
62-
callback(object);
63-
});
59+
);
6460
}
6561

6662
return{

‎express-app/db-adapters/sql-crud-adapter.js‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -3,7 +3,7 @@ function SQLCRUDAdapter(queryExecutorFunction) {
33
filter=filter||[];
44
letwhere="";
55
if(filter.length>0){
6-
where+=" WHERE "+filter.map(fi=>""+fi.name+fi.op+fi.value).join(" AND ");
6+
where+=" WHERE "+filter.map(fi=>""+fi.name+fi.op+"'"+fi.value+"'").join(" AND ");
77
}
88

99
constcommand="SELECT * FROM "+tableName+where;

‎express-app/db-adapters/survey-storage.js‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -28,7 +28,7 @@ function SurveyStorage(dbQueryAdapter) {
2828
return{
2929
addSurvey:addSurvey,
3030
getSurvey:function(surveyId,callback){
31-
dbQueryAdapter.retrieve("surveys",[{name:"id",op:"=",value:"'"+surveyId+"'"}],function(results){callback(results[0]);});
31+
dbQueryAdapter.retrieve("surveys",[{name:"id",op:"=",value:surveyId}],function(results){callback(results[0]);});
3232
},
3333
storeSurvey:function(id,name,json,callback){
3434
dbQueryAdapter.update("surveys",{id:id,json:json},function(results){callback(results);});
@@ -41,7 +41,7 @@ function SurveyStorage(dbQueryAdapter) {
4141
},
4242
postResults:postResults,
4343
getResults:function(postId,callback){
44-
dbQueryAdapter.retrieve("results",[{name:"postid",op:"=",value:"'"+postId+"'"}],function(results){callback({id:postId,data:results.map(r=>r.json)});});
44+
dbQueryAdapter.retrieve("results",[{name:"postid",op:"=",value:postId}],function(results){callback({id:postId,data:results.map(r=>r.json)});});
4545
},
4646
changeName:function(id,name,callback){
4747
dbQueryAdapter.update("surveys",{id:id,name:name},function(results){callback(results);});

‎express-app/package-lock.json‎

Lines changed: 2 additions & 2 deletions
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‎express-app/package.json‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,5 @@
11
{
2-
"name":"surveyjs-nodejs-postgres",
2+
"name":"surveyjs-nodejs-mongo",
33
"version":"0.1.0",
44
"description":"Sample NodeJS backend for SurveyJS: Survey Library and Survey Creator",
55
"main":"index.js",

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