Mittwoch, 18. Mai, 2016

MongoDB CRUD the MVC way with Passport Authentication 50
Create
You can use three commands to create documents in MongoDB:
• insert
– db.todos.insert({“title”:”Write a post”, “user”: “nikola”})
• update
– usually used to update an existing document, but if you set the upsert flag, it will create
a new document if it does not exist:
db.todos.update({ “user”: “nikola” }, { “title”: “Buy Bitcoins”, “user”: “nikola” }, { upsert:
true } )
• save
– creates a new document even if the exact one (content wise) exists:
1 db.todos.save({"title":"Write a post", "user": "nikola"})
Read
To find all the documents of the todos collection, execute:
1 db.todos.find()
To find all the todos of the user nikola execute:
1 db.todos.find({ "user": "nikola" })
To find all todos that were created by either nikola or josipa, you can use the $in operator:
1 db.todos.find({ "user": { $in: ["josipa", "nikola"] } })
Another way to find all todos that were created by either nikola or josipa:
1 db.todos.find( { $or: [{ "user": "nikola" }, { "user": "josipa" }] })
To find all todos that were created by nikola and have a priority greater than 3:
1 db.todos.find({ "user": "nikola", "priority": { $gt: 3 } })