You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: mod.rs
    path of file: ./repos/Plume/plume-models/src/timeline
    
    the code of the file until where you have to start completion: use crate::{
    lists::List,
    posts::Post,
    schema::{posts, timeline, timeline_definition},
    Connection, Error, Result,
};
use diesel::{self, BoolExpressionMethods, ExpressionMethods, QueryDsl, RunQueryDsl};
use std::cmp::Ordering;
use std::ops::Deref;

pub(crate) mod query;

pub use self::query::Kind;
pub use self::query::{QueryError, TimelineQuery};

#[derive(Clone, Debug, PartialEq, Eq, Queryable, Identifiable, AsChangeset)]
#[table_name = "timeline_definition"]
pub struct Timeline {
    pub id: i32,
    pub user_id: Option<i32>,
    pub name: String,
    pub query: String,
}

#[derive(Default, Insertable)]
#[table_name = "timeline_definition"]
pub struct NewTimeline {
    user_id: Option<i32>,
    name: String,
    query: String,
}

#[derive(Default, Insertable)]
#[table_name = "timeline"]
struct TimelineEntry {
    pub post_id: i32,
    pub timeline_id: i32,
}

impl Timeline {
    insert!(timeline_definition, NewTimeline);
    get!(timeline_definition);

    pub fn find_for_user_by_name(
        conn: &Connection,
        user_id: Option<i32>,
        name: &str,
    ) -> Result<Self> {
        if let Some(user_id) = user_id {
            timeline_definition::table
                .filter(timeline_definit
    
    fn test_simple_match() {
        let conn = &db();
        conn.test_transaction::<_, (), _>(|| {
            let (users, blogs) = blogTests::fill_database(conn);

            let gnu_tl = Timeline::new_for_user(
                conn,
                users[0].id,
                "GNU timeline".to_owned(),
                "license in [AGPL, LGPL, GPL]".to_owned(),
            )
            .unwrap();

            let gnu_post = Post::insert(
                conn,
                NewPost {
                    blog_id: blogs[0].id,
                    slug: "slug".to_string(),
                    title: "About Linux".to_string(),
                    content: SafeString::new("you must say GNU/Linux, not Linux!!!"),
                    published: true,
                    license: "GPL".to_string(),
                    ap_url: "".to_string(),
                    creation_date: None,
                    subtitle: "".to_string(),
                    source: "you must say GNU/Linux, not Linux!!!".to_string(),
                    cover_id: None,
                },
            )
            .unwrap();
            assert!(gnu_tl.matches(conn, &gnu_post, Kind::Original).unwrap());

            let non_free_post = Post::insert(
                conn,
                NewPost {
                    blog_id: blogs[0].id,
                    slug: "slug2".to_string(),
                    title: "Private is bad".to_string(),
                    content: SafeString::new("so is Microsoft"),
                    published: true,
                    license: "all right reserved".to_string(),
                    ap_url: "".to_string(),
                    creation_date: None,
                    subtitle: "".to_string(),
                    source: "so is Microsoft".to_string(),
                    cover_id: None,
                },
            )
            .unwrap();
            assert!(!gnu_tl
                .matches(conn, &non_free_post, Kind::Original)
                .unwrap());

            Ok(())
        });
    }