Minor refactoring

cookbook/src/models.rs

@@ -1,5 +1,6 @@
 use super::schema::recipes;
 use super::schema::ingredients;
+use super::diesel::prelude::*;
 
 #[derive(Queryable)]
 pub struct Recipe {
@@ -15,10 +16,29 @@ pub struct Recipe {
 pub struct NewRecipe<'a> {
     pub title: &'a str,
     pub category: i32,
-    pub ingredients: String,
+    pub ingredients: &'a str,
     pub preparation: &'a str,
 }
 
+impl<'a> NewRecipe<'a> {
+    pub fn new(title: &'a str, category: i32, ingredients: &'a str, preparation: &'a str) -> Self {
+        NewRecipe{
+            title,
+            category,
+            ingredients,
+            preparation,
+        }
+    }
+
+    pub fn insert(self, conn: &SqliteConnection) -> Result<Self, String> {
+        diesel::insert_into(recipes::table)
+            .values(&self)
+            .execute(conn)
+            .expect("Error inserting recipe");
+        Ok(self)
+    }
+}
+
 #[derive(Queryable)]
 pub struct Ingredient {
     pub id: i32,