Add relation between blogs and authors

src/models/blog_authors.rs

@@ -0,0 +1,36 @@
+use diesel;
+use diesel::{QueryDsl, RunQueryDsl, ExpressionMethods, PgConnection};
+use schema::blog_authors;
+
+#[derive(Queryable, Identifiable)]
+pub struct BlogAuthor {
+    pub id: i32,
+    pub blog_id: i32,
+    pub author_id: i32,
+    pub is_owner: bool,
+}
+
+#[derive(Insertable)]
+#[table_name = "blog_authors"]
+pub struct NewBlogAuthor {
+    pub blog_id: i32,
+    pub author_id: i32,
+    pub is_owner: bool,
+}
+
+impl BlogAuthor {
+    pub fn insert (conn: &PgConnection, new: NewBlogAuthor) -> BlogAuthor {
+        diesel::insert_into(blog_authors::table)
+            .values(new)
+            .get_result(conn)
+            .expect("Error saving new blog")
+    }
+
+    pub fn get(conn: &PgConnection, id: i32) -> Option<BlogAuthor> {
+        blog_authors::table.filter(blog_authors::id.eq(id))
+            .limit(1)
+            .load::<BlogAuthor>(conn)
+            .expect("Error loading blog by id")
+            .into_iter().nth(0)
+    }
+}

src/models/mod.rs

@@ -1,3 +1,4 @@
+pub mod blog_authors;
 pub mod blogs;
 pub mod instance;
 pub mod user;