Mapping other collection by same schema name on Mongoose - node.js

Question

Engine Collection
var EngineSchema = new mongoose.Schema({
name: String,
GF2: String,
GF3: String,
GF4: String,
ll98: String,
ll01: String,
ll04: String
});
Oil Collection
var OilSchema = new mongoose.Schema({
name: String,
GF2: String,
GF3: String,
GF4: String,
ll98: String,
ll01: String,
ll04: String
});
I made simple
Engine DB
{ _id: 57d9604b7ecbc0029a3aad3c,
name: 'N54 B30A',
ll01: '1',
ll01fe: '1',
ll04: '1',
__v: 0 }
OilDB
[ { _id: 57d9614265e6c402a2c09990, name: 'EDGE', ll04: '1', __v: 0 },
{ _id: 57d98e12acc05505cfd15aae,
name: 'SYNTEC',
GF2: '1',
GF3: '1',
GF4: '1',
__v: 0 } ]
If I have the N54 B30A than It needs classification about ll98, ll01, ll04
EDGE Product only one about classification ll04
totally I choose the 'N54 B30A' that has ll04 classification so I want to appear something that has the ll04 classification
'N54 B30A' -> ll04
'EDGE' -> ll04
ll04 mapping?
Select N54 B30A -> appear EDGE
My Code Simple but It did't execute
Engine.findOne({name: 'N54 B30A'}, {_id: 0, name: 0, __v: 0}, function(err, engine) {
var result = Object.keys(engine.toObject());//[ 'll01', 'll01fe', 'll04' ]
Oil.findOne({result[2] : 1},function (err, oil) {
console.log(oil)
});
})
More Question
I want to search many kind atrribute(ll01, ll01fe, ll04) such as
findOne({$or:{ll01:1},{ll01le:1},{ll04:1}},function...)
but I don't know how to add one item like {ll01 : 1} than add {ll01le:1} and {ll04:1}
I tried coding
My Code
Engine.findOne({name: 'N54 B30A'}, {_id: 0, name: 0, __v: 0}, function (err, engine) {
var result = Object.keys(engine.toObject());//[ 'll01', 'll01fe', 'll04' ]
var Json = [];
result.forEach(function (item) {
var code = {};
code[item] =1;
Json.push(code);
});
console.log(Json);
Oil.find({$or: Json}, function (err, oil) {
console.log(oil)
});
})
I'm not useful javascript so I made by only my thinking. is this right?

Answer 1

You cannot assign a value to JSON as {result[2] : 1}. Change your code to this
Engine.findOne({name: 'N54 B30A'}, {_id: 0, name: 0, __v: 0}, function(err, engine) {
var result = Object.keys(engine.toObject());//[ 'll01', 'll01fe', 'll04' ]
var oilFindQuery = {};
oilFindQuery[result[2]] = 1;
//or query
var orQuery = [];
result.forEach(function (item) {
var queryItem = {};
queryItem[item] = 1
orQuery.push(queryItem);
});
//oilFindQuery = {$or: orQuery};
Oil.findOne(oilFindQuery, function (err, oil) {
console.log(oil)
});
})