Add relation between blogs and authors
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-- This file should undo anything in `up.sql`
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DROP TABLE blog_authors;
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7
migrations/2018-04-23-111655_create_blog_authors/up.sql
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7
migrations/2018-04-23-111655_create_blog_authors/up.sql
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-- Your SQL goes here
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CREATE TABLE blog_authors (
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id SERIAL PRIMARY KEY,
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blog_id INTEGER REFERENCES blogs(id) ON DELETE CASCADE NOT NULL,
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author_id INTEGER REFERENCES users(id) ON DELETE CASCADE NOT NULL,
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is_owner BOOLEAN NOT NULL DEFAULT 'f'
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)
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36
src/models/blog_authors.rs
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36
src/models/blog_authors.rs
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use diesel;
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use diesel::{QueryDsl, RunQueryDsl, ExpressionMethods, PgConnection};
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use schema::blog_authors;
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#[derive(Queryable, Identifiable)]
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pub struct BlogAuthor {
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pub id: i32,
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pub blog_id: i32,
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pub author_id: i32,
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pub is_owner: bool,
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}
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#[derive(Insertable)]
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#[table_name = "blog_authors"]
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pub struct NewBlogAuthor {
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pub blog_id: i32,
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pub author_id: i32,
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pub is_owner: bool,
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}
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impl BlogAuthor {
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pub fn insert (conn: &PgConnection, new: NewBlogAuthor) -> BlogAuthor {
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diesel::insert_into(blog_authors::table)
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.values(new)
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.get_result(conn)
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.expect("Error saving new blog")
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}
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pub fn get(conn: &PgConnection, id: i32) -> Option<BlogAuthor> {
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blog_authors::table.filter(blog_authors::id.eq(id))
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.limit(1)
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.load::<BlogAuthor>(conn)
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.expect("Error loading blog by id")
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.into_iter().nth(0)
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}
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}
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@ -1,3 +1,4 @@
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pub mod blog_authors;
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pub mod blogs;
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pub mod blogs;
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pub mod instance;
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pub mod instance;
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pub mod user;
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pub mod user;
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table! {
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blog_authors (id) {
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id -> Int4,
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blog_id -> Int4,
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author_id -> Int4,
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is_owner -> Bool,
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}
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}
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table! {
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table! {
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blogs (id) {
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blogs (id) {
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id -> Int4,
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id -> Int4,
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@ -36,10 +45,13 @@ table! {
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}
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}
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}
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}
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joinable!(blog_authors -> blogs (blog_id));
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joinable!(blog_authors -> users (author_id));
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joinable!(blogs -> instances (instance_id));
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joinable!(blogs -> instances (instance_id));
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joinable!(users -> instances (instance_id));
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joinable!(users -> instances (instance_id));
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allow_tables_to_appear_in_same_query!(
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allow_tables_to_appear_in_same_query!(
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blog_authors,
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blogs,
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blogs,
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instances,
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instances,
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users,
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users,
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