Add relation between blogs and authors

This commit is contained in:
Bat 2018-04-23 12:27:27 +01:00
parent 4f9df753f5
commit 68db4a82cf
5 changed files with 58 additions and 0 deletions

View File

@ -0,0 +1,2 @@
-- This file should undo anything in `up.sql`
DROP TABLE blog_authors;

View File

@ -0,0 +1,7 @@
-- Your SQL goes here
CREATE TABLE blog_authors (
id SERIAL PRIMARY KEY,
blog_id INTEGER REFERENCES blogs(id) ON DELETE CASCADE NOT NULL,
author_id INTEGER REFERENCES users(id) ON DELETE CASCADE NOT NULL,
is_owner BOOLEAN NOT NULL DEFAULT 'f'
)

View File

@ -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)
}
}

View File

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

View File

@ -1,3 +1,12 @@
table! {
blog_authors (id) {
id -> Int4,
blog_id -> Int4,
author_id -> Int4,
is_owner -> Bool,
}
}
table! { table! {
blogs (id) { blogs (id) {
id -> Int4, id -> Int4,
@ -36,10 +45,13 @@ table! {
} }
} }
joinable!(blog_authors -> blogs (blog_id));
joinable!(blog_authors -> users (author_id));
joinable!(blogs -> instances (instance_id)); joinable!(blogs -> instances (instance_id));
joinable!(users -> instances (instance_id)); joinable!(users -> instances (instance_id));
allow_tables_to_appear_in_same_query!( allow_tables_to_appear_in_same_query!(
blog_authors,
blogs, blogs,
instances, instances,
users, users,