![]() ![]() In this tutorial, to add the Realm database to our project, we will use Cocoapods. Create a single-view iOS application with swift, as shown below. They have many similarities with regular Arrays, including the subscript syntax.įirst, we need to create a new XCode project. Results: Results is an auto-updating container type that you get back from object queries.If your data retrieval needs are more complex, you can use predicates, chain your queries and order your results. The simplest form of a query is calling objects() on a Realm instance and passing in the class of the object you're looking for. Queries: To retrieve objects from the database, you use queries.Write Transactions: Any operations in the database, like creating, editing, or deleting objects, must be performed within writes by calling write(_:) on Realm instances.We can create many-to-one and many-to-many relationships via a property of type List. Relationships: we can create one-to-many relationships between objects by declaring a property of the Object's type to which we want to refer.To create the model, we need to subclass Object and define the fields we want to persist as properties. We need to create the model to define the database schema. The instances can be created using the Realm() initializer. It works as the access point to the underlying database like a Core Data managed object context. Realm: Realm instances are the basic building block of the framework.To understand the proper functioning of the Realm database, we need to know about the classes that we are going to use in this tutorial. Free: Realm is free with all the benefits it has provided.Good documentation & Support: Realm team provides rich documentation about installing and using the Realm database in our applications.We will also get speed and smoothness while using Realm in the application. We can use Realm to deal with a huge amount of data in a lesser time. Scalability: It is very important to consider the database's scalability while developing applications that deal with a large number of users and their records.Cross-Platform: Realm database is cross-platform and therefore can easily work on iOS and android regardless of the technology we are working upon.Realm works faster than SQLite and CoreData for iOS applications. Works faster than other databases: It is faster to save, retrieve, or performing any database operations in Realm.We can easily install Realm in iOS applications just by using the Cocoapods. Easy to install: in iOS, it is very simple to install Realm in applications.In this section of the tutorial, we will discuss the advantages and disadvantages of the Realm database. It is easier to use and also requires less code to retrieve and store the data. Realm is superior to other mobile databases in terms of speed. It is mainly designed to be easy to use as it not an ORM as it uses its persistence engine to provide speed and performance. Realm is an alternative for the mobile databases as currently, we don't have many options other than SQLite or any wrapper that works on the top of SQLite, such as CoreData. It is free to use for iOS and Android apps without any limits. It's easier to use and requires less code to store and retrieve data. It works better and faster than SQLite and CoreData for iOS applications. Realm is a database that is built to target mobile applications for iOS and Android. We will discuss the basic CRUD (create, read, update, delete) operations with the database. In this tutorial, we will create a new iOS project to use Realm to store the data. It is free of charge for unlimited use until we take advantage of Realm's Cloud features. It is faster and easier to use than CoreData and SQLite. ![]() The realm is an alternative to Apple's CoreData. We have used SQLite and CoreData to persist the data in iOS applications. Next → ← prev Using Realm database in iOS app ![]()
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