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paginated authors

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This commit is contained in:
Sebastian Hugentobler 2024-05-06 13:51:49 +02:00
parent 352d4e0a7a
commit ead3672570
Signed by: shu
GPG key ID: BB32CF3CA052C2F0
12 changed files with 175 additions and 23 deletions
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25
calibre-db/src/data/author.rs
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@ -26,9 +26,9 @@ impl Author {
conn: &Connection,
limit: u64,
cursor: Option<&str>,
sort_order: SortOrder,
sort_order: &SortOrder,
) -> Result<Vec<Self>, DataStoreError> {
let pagination = Pagination::new("sort", cursor, limit, sort_order);
let pagination = Pagination::new("sort", cursor, limit, *sort_order);
pagination.paginate(
conn,
"SELECT id, name, sort FROM authors",
@ -46,4 +46,25 @@ impl Author {
let params = named_params! { ":id": id };
Ok(stmt.query_row(params, Self::from_row)?)
}
pub fn has_previous_authors(
conn: &Connection,
sort_name: &str,
) -> Result<bool, DataStoreError> {
let mut stmt = conn
.prepare("SELECT Count(1) FROM authors WHERE sort < (:sort_name) ORDER BY sort DESC")?;
let params = named_params! { ":sort_name": sort_name };
let count: u64 = stmt.query_row(params, |x| x.get(0))?;
Ok(count > 0)
}
pub fn has_more_authors(conn: &Connection, sort_name: &str) -> Result<bool, DataStoreError> {
let mut stmt = conn
.prepare("SELECT Count(1) FROM authors WHERE sort > (:sort_name) ORDER BY sort ASC")?;
let params = named_params! { ":sort_name": sort_name };
let count: u64 = stmt.query_row(params, |x| x.get(0))?;
Ok(count > 0)
}
}