Welcome to your guide on SwiftDB! In this article, we will explore how to leverage this modern, type-safe database abstraction layer. Whether you are handling relational or document-oriented databases, SwiftDB aims to provide a seamless experience. Let’s dive in!

Step 1: Define an Entity

First, you need to define your data model, referred to as an Entity in SwiftDB. Here is how you can create a simple entity called Foo:

struct Foo: Entity, Identifiable {
    @Attribute var bar: String = "Untitled"
    var id: some Hashable { bar }
}

Think of an entity as a blueprint for a house. Just like a blueprint outlines what the house will contain (rooms, dimensions, etc.), the entity defines what data fields it has.

Step 2: Define a Schema

Next, you will create a Schema that ties your entities together. Here’s how you can define your schema:

struct MySchema: Schema {
    var entities: Entities { Foo.self }
}

In our analogy, the schema is like a city plan that includes various house blueprints. It forms the structure of how different entities (houses) will interact and be organized.

Step 3: Create a ContentView for Your Application

Now, let’s create a user interface that serves as the main view for your application:

struct ContentView: View {
    @StateObject var container = PersistentContainer(MySchema())

    var body: some View {
        Text("Hello World")
    }
}

Think of ContentView as the entrance to your neighborhood. It’s the first thing your users see, and it leads them to explore more!

Step 4: Create a List View

To allow users to view a list of items created from your entity, follow this step:

struct ListView: View {
    @EnvironmentObject var container: PersistentContainer
    @QueryModels(Foo()) var models

    var body: some View {
        NavigationView {
            List(models) { foo in
                NavigationLink(destination: EditView(foo: foo)) {
                    Text(foo.bar)
                }
                .contextMenu {
                    Button {
                        container.delete(foo)
                    } label: {
                        Text("Delete")
                    }
                }
            }
            .navigationBarItems(trailing: Button {
                container.create(Foo.self)
            } label: {
                Image(systemName: "plus.circle.fill")
                    .imageScale(.large)
            })
            .navigationBarTitle("A List of Foo")
        }
    }
}

The list view acts like a directory of houses. Each entry represents a home you can click and explore further.

Step 5: Create an Edit View

To edit items in your list, create an Edit View as follows:

struct EditView: View {
    @EnvironmentObject var container: PersistentContainer
    let foo: Foo

    var body: some View {
        VStack {
            Form {
                TextField("Enter a value", text: foo.$bar)
                container.save()
            }
        }
        .navigationBarTitle("Edit Foo")
    }
}

Imagine the Edit View as a renovation workshop for your houses. Here, users can change the design or style of their homes (entities).

Step 6: Integrate Everything in ContentView

Finally, tie everything together in your main ContentView:

struct ContentView: View {
    @StateObject var container = PersistentContainer(MySchema())

    var body: some View {
        ListView()
            .databaseContainer(container)
    }
}

This step ensures your entire neighborhood is functional and accessible, allowing smooth operation of your application.

Troubleshooting

If you encounter issues, here are some troubleshooting tips:

• Ensure that your entity names match the schema.
• Check for typos in your property declarations.
• If the database is not saving, verify your container setup.

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Conclusion

With these steps, you are well on your way to building a robust application using SwiftDB. At fxis.ai, we believe that such advancements are crucial for the future of AI, as they enable more comprehensive and effective solutions. Our team is continually exploring new methodologies to push the envelope in artificial intelligence, ensuring that our clients benefit from the latest technological innovations.