Add relation between posts and authors

src/models/mod.rs

@@ -1,5 +1,6 @@
 pub mod blog_authors;
 pub mod blogs;
 pub mod instance;
+pub mod post_authors;
 pub mod post;
 pub mod user;

src/models/post_authors.rs

@@ -0,0 +1,34 @@
+use diesel;
+use diesel::{PgConnection, QueryDsl, RunQueryDsl, ExpressionMethods};
+use schema::post_authors;
+
+#[derive(Queryable, Identifiable)]
+pub struct PostAuthor {
+    pub id: i32,
+    pub post_id: i32,
+    pub author_id: i32
+}
+
+#[derive(Insertable)]
+#[table_name = "post_authors"]
+pub struct NewPostAuthor {
+    pub post_id: i32,
+    pub author_id: i32
+}
+
+impl PostAuthor {
+    pub fn insert (conn: &PgConnection, new: NewPostAuthor) -> PostAuthor {
+        diesel::insert_into(post_authors::table)
+            .values(new)
+            .get_result(conn)
+            .expect("Error saving new blog author")
+    }
+
+    pub fn get(conn: &PgConnection, id: i32) -> Option<PostAuthor> {
+        post_authors::table.filter(post_authors::id.eq(id))
+            .limit(1)
+            .load::<PostAuthor>(conn)
+            .expect("Error loading blog author by id")
+            .into_iter().nth(0)
+    }
+}