forked from freeCodeCamp/boilerplate-mongomongoose
/
myApp.js
165 lines (145 loc) · 4.39 KB
/
myApp.js
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require('dotenv').config();
let mongoose = require('mongoose');
// Connect to database; .env example: MONGODB_URI="mongodb+srv://user:root@cluster0.dpcylwq.mongodb.net/fcc-message-board?retryWrites=true&w=majority"; retryWrites=true -> automatically retry certain write operations a single time if they encounter network errors; w=majority -> requests acknowledgment that the write operation has propagated
mongoose.connect(process.env.MONGO_URI, { useNewUrlParser: true, useUnifiedTopology: true });
// Create schema
const personSchema = new mongoose.Schema({
name: {type: String, required: true, unique: true},
age: Number,
favoriteFoods: Array
})
// Create model wrapper on schema
let Person = mongoose.model("Person", personSchema);
// // Create model(Person) instance - variant 1
// let ada = new Person({
// name: "Ada",
// age: 22,
// favoriteFoods: ["porridge", "eggs", "yogurt"]
// })
// // Save model instance (ada)
// ada.save()
// .then(doc => {
// console.log(doc)
// })
// .catch(err => {
// console.error(err)
// })
// Create and save model instance (ada) - variant 2
// MongoDB database is empty because script in server.js remove items after invoking this functions
const createAndSavePerson = (done) => {
let ada = new Person({
name: "Ada",
age: 22,
favoriteFoods: ["porridge", "eggs", "yogurt"]
})
ada.save(function(err, data) {
if (err) return console.error(err);
done(null, data);
});
};
// Create many instances of model
let arrayOfPeople = [{name: 'ada', age:22}, {name: 'jhon', age:25}, {name: 'test', age:100}]
const createManyPeople = (arrayOfPeople, done) => {
Person.create(arrayOfPeople, function(err, data) {
if (err) return console.error(err);
done(null, data);
});
};
// Find instance
const findPeopleByName = (personName, done) => {
Person.find({name: personName}, function (err, personFound) {
if (err) return console.log(err);
done(null, personFound);
})
};
const findOneByFood = (food, done) => {
Person.findOne({favoriteFoods: food}, function (err, foodFound) {
if (err) return console.log(err);
done(null, foodFound);
})
};
const findPersonById = (personId, done) => {
Person.findById({_id: personId}, function (err, data) {
if (err) return console.log(err);
done(null, data);
})
};
const findEditThenSave = (personId, done) => {
const foodToAdd = "hamburger";
// .findById by personId
Person.findById({_id: personId}, function (err, data) {
if (err) return console.log(err)
// .push() item to array
data.favoriteFoods.push(foodToAdd)
// .save() the updated Person inside the find callback
data.save((err, updatedPerson) => {
if(err) return console.log(err);
done(null, updatedPerson)
})
})
};
const findAndUpdate = (personName, done) => {
const ageToSet = 20;
// Use .findAndUpdate() function
Person.findOneAndUpdate(
{name: personName},
{age: ageToSet},
{new: true},
(err, updatedDoc) => {
if(err) return console.log(err);
done(null, updatedDoc);
}
)
};
const removeById = (personId, done) => {
Person.findByIdAndRemove(
{_id: personId},
(err, updatedDoc) => {
if(err) return console.log(err);
done(null, updatedDoc);
}
)
};
const removeManyPeople = (done) => {
const nameToRemove = "Mary";
Person.remove(
{name: nameToRemove},
(err, data) => {
if(err) return console.log(err);
done(null, data);
}
)
};
const queryChain = (done) => {
const foodToSearch = "burrito";
const findPerson =
Person
.find({favoriteFoods: foodToSearch})
.sort({name: 1})
.limit(2)
.select({age: 0})
.exec((err, data) => {
if(!err) {
done(null, data);
console.log(`Chained Successfully. Results: ${data}`)
} else {
console.log(err);
}
}
)
};
/** **Well Done !!**
/* You completed these challenges, let's go celebrate !
*/
//----- **DO NOT EDIT BELOW THIS LINE** ----------------------------------
exports.PersonModel = Person;
exports.createAndSavePerson = createAndSavePerson;
exports.findPeopleByName = findPeopleByName;
exports.findOneByFood = findOneByFood;
exports.findPersonById = findPersonById;
exports.findEditThenSave = findEditThenSave;
exports.findAndUpdate = findAndUpdate;
exports.createManyPeople = createManyPeople;
exports.removeById = removeById;
exports.removeManyPeople = removeManyPeople;
exports.queryChain = queryChain;