crates/db_queries/src/aggregates/post_aggregates.rs

   1 use diesel::{result::Error, *};
   2 use lemmy_db_schema::{schema::post_aggregates, PostId};
   3 use serde::Serialize;
   4
   5 #[derive(Queryable, Associations, Identifiable, PartialEq, Debug, Serialize, Clone)]
   6 #[table_name = "post_aggregates"]
   7 pub struct PostAggregates {
   8   pub id: i32,
   9   pub post_id: PostId,
  10   pub comments: i64,
  11   pub score: i64,
  12   pub upvotes: i64,
  13   pub downvotes: i64,
  14   pub stickied: bool,
  15   pub published: chrono::NaiveDateTime,
  16   pub newest_comment_time_necro: chrono::NaiveDateTime, // A newest comment time, limited to 2 days, to prevent necrobumping
  17   pub newest_comment_time: chrono::NaiveDateTime,
  18 }
  19
  20 impl PostAggregates {
  21   pub fn read(conn: &PgConnection, post_id: PostId) -> Result<Self, Error> {
  22     post_aggregates::table
  23       .filter(post_aggregates::post_id.eq(post_id))
  24       .first::<Self>(conn)
  25   }
  26 }
  27
  28 #[cfg(test)]
  29 mod tests {
  30   use crate::{
  31     aggregates::post_aggregates::PostAggregates,
  32     establish_unpooled_connection,
  33     Crud,
  34     Likeable,
  35   };
  36   use lemmy_db_schema::source::{
  37     comment::{Comment, CommentForm},
  38     community::{Community, CommunityForm},
  39     person::{Person, PersonForm},
  40     post::{Post, PostForm, PostLike, PostLikeForm},
  41   };
  42   use serial_test::serial;
  43
  44   #[test]
  45   #[serial]
  46   fn test_crud() {
  47     let conn = establish_unpooled_connection();
  48
  49     let new_person = PersonForm {
  50       name: "thommy_community_agg".into(),
  51       ..PersonForm::default()
  52     };
  53
  54     let inserted_person = Person::create(&conn, &new_person).unwrap();
  55
  56     let another_person = PersonForm {
  57       name: "jerry_community_agg".into(),
  58       ..PersonForm::default()
  59     };
  60
  61     let another_inserted_person = Person::create(&conn, &another_person).unwrap();
  62
  63     let new_community = CommunityForm {
  64       name: "TIL_community_agg".into(),
  65       title: "nada".to_owned(),
  66       ..CommunityForm::default()
  67     };
  68
  69     let inserted_community = Community::create(&conn, &new_community).unwrap();
  70
  71     let new_post = PostForm {
  72       name: "A test post".into(),
  73       creator_id: inserted_person.id,
  74       community_id: inserted_community.id,
  75       ..PostForm::default()
  76     };
  77
  78     let inserted_post = Post::create(&conn, &new_post).unwrap();
  79
  80     let comment_form = CommentForm {
  81       content: "A test comment".into(),
  82       creator_id: inserted_person.id,
  83       post_id: inserted_post.id,
  84       ..CommentForm::default()
  85     };
  86
  87     let inserted_comment = Comment::create(&conn, &comment_form).unwrap();
  88
  89     let child_comment_form = CommentForm {
  90       content: "A test comment".into(),
  91       creator_id: inserted_person.id,
  92       post_id: inserted_post.id,
  93       parent_id: Some(inserted_comment.id),
  94       ..CommentForm::default()
  95     };
  96
  97     let _inserted_child_comment = Comment::create(&conn, &child_comment_form).unwrap();
  98
  99     let post_like = PostLikeForm {
 100       post_id: inserted_post.id,
 101       person_id: inserted_person.id,
 102       score: 1,
 103     };
 104
 105     PostLike::like(&conn, &post_like).unwrap();
 106
 107     let post_aggs_before_delete = PostAggregates::read(&conn, inserted_post.id).unwrap();
 108
 109     assert_eq!(2, post_aggs_before_delete.comments);
 110     assert_eq!(1, post_aggs_before_delete.score);
 111     assert_eq!(1, post_aggs_before_delete.upvotes);
 112     assert_eq!(0, post_aggs_before_delete.downvotes);
 113
 114     // Add a post dislike from the other person
 115     let post_dislike = PostLikeForm {
 116       post_id: inserted_post.id,
 117       person_id: another_inserted_person.id,
 118       score: -1,
 119     };
 120
 121     PostLike::like(&conn, &post_dislike).unwrap();
 122
 123     let post_aggs_after_dislike = PostAggregates::read(&conn, inserted_post.id).unwrap();
 124
 125     assert_eq!(2, post_aggs_after_dislike.comments);
 126     assert_eq!(0, post_aggs_after_dislike.score);
 127     assert_eq!(1, post_aggs_after_dislike.upvotes);
 128     assert_eq!(1, post_aggs_after_dislike.downvotes);
 129
 130     // Remove the parent comment
 131     Comment::delete(&conn, inserted_comment.id).unwrap();
 132     let after_comment_delete = PostAggregates::read(&conn, inserted_post.id).unwrap();
 133     assert_eq!(0, after_comment_delete.comments);
 134     assert_eq!(0, after_comment_delete.score);
 135     assert_eq!(1, after_comment_delete.upvotes);
 136     assert_eq!(1, after_comment_delete.downvotes);
 137
 138     // Remove the first post like
 139     PostLike::remove(&conn, inserted_person.id, inserted_post.id).unwrap();
 140     let after_like_remove = PostAggregates::read(&conn, inserted_post.id).unwrap();
 141     assert_eq!(0, after_like_remove.comments);
 142     assert_eq!(-1, after_like_remove.score);
 143     assert_eq!(0, after_like_remove.upvotes);
 144     assert_eq!(1, after_like_remove.downvotes);
 145
 146     // This should delete all the associated rows, and fire triggers
 147     Person::delete(&conn, another_inserted_person.id).unwrap();
 148     let person_num_deleted = Person::delete(&conn, inserted_person.id).unwrap();
 149     assert_eq!(1, person_num_deleted);
 150
 151     // Delete the community
 152     let community_num_deleted = Community::delete(&conn, inserted_community.id).unwrap();
 153     assert_eq!(1, community_num_deleted);
 154
 155     // Should be none found, since the creator was deleted
 156     let after_delete = PostAggregates::read(&conn, inserted_post.id);
 157     assert!(after_delete.is_err());
 158   }
 159 }