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::{Deserialize, Serialize};
   4
   5 #[derive(
   6   Queryable, Associations, Identifiable, PartialEq, Debug, Serialize, Deserialize, Clone,
   7 )]
   8 #[table_name = "post_aggregates"]
   9 pub struct PostAggregates {
  10   pub id: i32,
  11   pub post_id: PostId,
  12   pub comments: i64,
  13   pub score: i64,
  14   pub upvotes: i64,
  15   pub downvotes: i64,
  16   pub stickied: bool,
  17   pub published: chrono::NaiveDateTime,
  18   pub newest_comment_time_necro: chrono::NaiveDateTime, // A newest comment time, limited to 2 days, to prevent necrobumping
  19   pub newest_comment_time: chrono::NaiveDateTime,
  20 }
  21
  22 impl PostAggregates {
  23   pub fn read(conn: &PgConnection, post_id: PostId) -> Result<Self, Error> {
  24     post_aggregates::table
  25       .filter(post_aggregates::post_id.eq(post_id))
  26       .first::<Self>(conn)
  27   }
  28 }
  29
  30 #[cfg(test)]
  31 mod tests {
  32   use crate::{
  33     aggregates::post_aggregates::PostAggregates,
  34     establish_unpooled_connection,
  35     Crud,
  36     Likeable,
  37   };
  38   use lemmy_db_schema::source::{
  39     comment::{Comment, CommentForm},
  40     community::{Community, CommunityForm},
  41     person::{Person, PersonForm},
  42     post::{Post, PostForm, PostLike, PostLikeForm},
  43   };
  44   use serial_test::serial;
  45
  46   #[test]
  47   #[serial]
  48   fn test_crud() {
  49     let conn = establish_unpooled_connection();
  50
  51     let new_person = PersonForm {
  52       name: "thommy_community_agg".into(),
  53       ..PersonForm::default()
  54     };
  55
  56     let inserted_person = Person::create(&conn, &new_person).unwrap();
  57
  58     let another_person = PersonForm {
  59       name: "jerry_community_agg".into(),
  60       ..PersonForm::default()
  61     };
  62
  63     let another_inserted_person = Person::create(&conn, &another_person).unwrap();
  64
  65     let new_community = CommunityForm {
  66       name: "TIL_community_agg".into(),
  67       title: "nada".to_owned(),
  68       ..CommunityForm::default()
  69     };
  70
  71     let inserted_community = Community::create(&conn, &new_community).unwrap();
  72
  73     let new_post = PostForm {
  74       name: "A test post".into(),
  75       creator_id: inserted_person.id,
  76       community_id: inserted_community.id,
  77       ..PostForm::default()
  78     };
  79
  80     let inserted_post = Post::create(&conn, &new_post).unwrap();
  81
  82     let comment_form = CommentForm {
  83       content: "A test comment".into(),
  84       creator_id: inserted_person.id,
  85       post_id: inserted_post.id,
  86       ..CommentForm::default()
  87     };
  88
  89     let inserted_comment = Comment::create(&conn, &comment_form).unwrap();
  90
  91     let child_comment_form = CommentForm {
  92       content: "A test comment".into(),
  93       creator_id: inserted_person.id,
  94       post_id: inserted_post.id,
  95       parent_id: Some(inserted_comment.id),
  96       ..CommentForm::default()
  97     };
  98
  99     let _inserted_child_comment = Comment::create(&conn, &child_comment_form).unwrap();
 100
 101     let post_like = PostLikeForm {
 102       post_id: inserted_post.id,
 103       person_id: inserted_person.id,
 104       score: 1,
 105     };
 106
 107     PostLike::like(&conn, &post_like).unwrap();
 108
 109     let post_aggs_before_delete = PostAggregates::read(&conn, inserted_post.id).unwrap();
 110
 111     assert_eq!(2, post_aggs_before_delete.comments);
 112     assert_eq!(1, post_aggs_before_delete.score);
 113     assert_eq!(1, post_aggs_before_delete.upvotes);
 114     assert_eq!(0, post_aggs_before_delete.downvotes);
 115
 116     // Add a post dislike from the other person
 117     let post_dislike = PostLikeForm {
 118       post_id: inserted_post.id,
 119       person_id: another_inserted_person.id,
 120       score: -1,
 121     };
 122
 123     PostLike::like(&conn, &post_dislike).unwrap();
 124
 125     let post_aggs_after_dislike = PostAggregates::read(&conn, inserted_post.id).unwrap();
 126
 127     assert_eq!(2, post_aggs_after_dislike.comments);
 128     assert_eq!(0, post_aggs_after_dislike.score);
 129     assert_eq!(1, post_aggs_after_dislike.upvotes);
 130     assert_eq!(1, post_aggs_after_dislike.downvotes);
 131
 132     // Remove the parent comment
 133     Comment::delete(&conn, inserted_comment.id).unwrap();
 134     let after_comment_delete = PostAggregates::read(&conn, inserted_post.id).unwrap();
 135     assert_eq!(0, after_comment_delete.comments);
 136     assert_eq!(0, after_comment_delete.score);
 137     assert_eq!(1, after_comment_delete.upvotes);
 138     assert_eq!(1, after_comment_delete.downvotes);
 139
 140     // Remove the first post like
 141     PostLike::remove(&conn, inserted_person.id, inserted_post.id).unwrap();
 142     let after_like_remove = PostAggregates::read(&conn, inserted_post.id).unwrap();
 143     assert_eq!(0, after_like_remove.comments);
 144     assert_eq!(-1, after_like_remove.score);
 145     assert_eq!(0, after_like_remove.upvotes);
 146     assert_eq!(1, after_like_remove.downvotes);
 147
 148     // This should delete all the associated rows, and fire triggers
 149     Person::delete(&conn, another_inserted_person.id).unwrap();
 150     let person_num_deleted = Person::delete(&conn, inserted_person.id).unwrap();
 151     assert_eq!(1, person_num_deleted);
 152
 153     // Delete the community
 154     let community_num_deleted = Community::delete(&conn, inserted_community.id).unwrap();
 155     assert_eq!(1, community_num_deleted);
 156
 157     // Should be none found, since the creator was deleted
 158     let after_delete = PostAggregates::read(&conn, inserted_post.id);
 159     assert!(after_delete.is_err());
 160   }
 161 }