Merge pull request #128 from SaezChristopher/feat/fixture-doc

Feat/fixture doc

fluent/fixtures.md

@@ -0,0 +1,39 @@
+---
+currentMenu: fluent-fixtures
+---
+
+# Fixtures
+When you want to prepopulate a database with existing data, you will need to create one or several fixtures. For example, in your table `users`, it's very common to create admin account and a test account just after the creation of the table. The following snippets of code show you how to deal with it.
+
+In a separate file (Database+Fixture.swift):
+```swift
+extension Database {
+    func insertFixtures<T: Entity, S: Sequence>(_ data: S) throws where S.Iterator.Element == T {
+        let context = DatabaseContext(self)
+        try data.forEach { model in
+            let query = Query<T>(self)
+            query.action = .create
+            query.data = try model.makeNode(context: context)
+            try driver.query(query)
+        }
+    }
+}
+```
+
+In your model User.swift file:
+```swift
+static func prepare(_ database: Database) throws {
+        try database.create("users") { users in
+            users.id()
+            users.string("email")
+            users.string("password")
+        }
+        let seedData: [AppUser] = [
+                try User(email: "admin@admin.com", rawPassword: "Def4ultPassword?!"),
+                try User(email: "test@test.com", rawPassword: "Def4ultPassword?!")
+        ]
+
+        try database.insertFixtures(seedData)
+ }
+ ```
+