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feat(blog) add implementation for table meta

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lumither committed 2024-07-21 23:09:13 +08:00
1 parent 0864f0b950
commit 67f9cd0b1d
3 files changed
+108
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backend/src/api/post/refresh.rs
+1
View File
@@ -147,6 +147,7 @@ async fn build_post_idx(
if build_post_idx::hash(db_connection, post_id, hash).await? {
build_post_idx::base(db_connection, &post, post_id, meta).await?;
build_post_idx::tag(db_connection, post_id, meta).await?;
build_post_idx::meta(db_connection, post_id, meta).await?;
}
Ok(())
backend/src/api/post/utils/build_post_idx.rs
+62
View File
@@ -212,3 +212,65 @@ INSERT INTO Hash (post_id, hash) VALUES ($1, $2)
}),
}
}
pub async fn meta(db_connection: &PgPool, post_id: Uuid, meta: &Value) -> Result<(), PostIdxError> {
if let Err(e) = query(
format!(
r"
DO
$$
DECLARE
_post_id UUID := '{}';
_meta_cols JSONB := '{}';
_exists BOOLEAN;
_col_name TEXT;
_col_value TEXT;
_sql TEXT;
_insert_columns TEXT := 'post_id';
_insert_values TEXT := quote_literal(_post_id);
_update_set TEXT := '';
BEGIN
SELECT EXISTS(SELECT 1 FROM meta WHERE post_id = _post_id) INTO _exists;
FOR _col_name, _col_value IN SELECT key, value FROM jsonb_each_text(_meta_cols)
LOOP
IF NOT EXISTS (SELECT 1
FROM information_schema.columns
WHERE table_name = 'meta'
AND column_name = _col_name
-- may change in the future
AND table_schema = 'public') THEN
_sql := 'ALTER TABLE meta ADD COLUMN ' || quote_ident(_col_name) || ' TEXT';
EXECUTE _sql;
END IF;
_insert_columns := _insert_columns || ', ' || quote_ident(_col_name);
_insert_values := _insert_values || ', ' || quote_literal(_col_value);
_update_set := _update_set || ', ' || quote_ident(_col_name) || ' = ' || quote_literal(_col_value);
END LOOP;
_update_set := substring(_update_set FROM 3);
IF _exists THEN
_sql := 'UPDATE meta SET ' || _update_set || ' WHERE post_id = ' || quote_literal(_post_id);
EXECUTE _sql;
ELSE
_sql := 'INSERT INTO meta (' || _insert_columns || ') VALUES (' || _insert_values || ')';
EXECUTE _sql;
END IF;
END;
$$ LANGUAGE plpgsql;
", post_id.to_string().as_str(), meta.to_string()
).as_str()
)
.execute(db_connection)
.await {
Err(PostIdxError::DBWriteFailure {
data_desc: "post meta data".to_string(),
db_table: "Meta".to_string(),
id: post_id.to_string(),
err_msg: e.to_string(),
})
} else {
Ok(())
}
}
backend/src/model/blog/meta.sql
+45
View File
@@ -2,3 +2,48 @@ CREATE TABLE IF NOT EXISTS Meta
(
post_id UUID PRIMARY KEY
);
DROP table meta;
DO
$$
DECLARE
_post_id UUID := 'd5a209d4-93b1-474e-8e4e-9c78d6e6e763'; -- test data
_meta_cols JSONB := '{"title": " title", "tags": "example tags", "new_col1": "new_value1", "new_col3": "new_value2"}'; -- test data
_exists BOOLEAN;
_col_name TEXT;
_col_value TEXT;
_sql TEXT;
_insert_columns TEXT := 'post_id';
_insert_values TEXT := quote_literal(_post_id);
_update_set TEXT := '';
BEGIN
SELECT EXISTS(SELECT 1 FROM meta WHERE post_id = _post_id) INTO _exists;
FOR _col_name, _col_value IN SELECT key, value FROM jsonb_each_text(_meta_cols)
LOOP
IF NOT EXISTS (SELECT 1
FROM information_schema.columns
WHERE table_name = 'meta'
AND column_name = _col_name
-- may change in the future
AND table_schema = 'public') THEN
_sql := 'ALTER TABLE meta ADD COLUMN ' || quote_ident(_col_name) || ' TEXT';
EXECUTE _sql;
END IF;
_insert_columns := _insert_columns || ', ' || quote_ident(_col_name);
_insert_values := _insert_values || ', ' || quote_literal(_col_value);
_update_set := _update_set || ', ' || quote_ident(_col_name) || ' = ' || quote_literal(_col_value);
END LOOP;
_update_set := substring(_update_set FROM 3);
IF _exists THEN
_sql := 'UPDATE meta SET ' || _update_set || ' WHERE post_id = ' || quote_literal(_post_id);
EXECUTE _sql;
ELSE
_sql := 'INSERT INTO meta (' || _insert_columns || ') VALUES (' || _insert_values || ')';
EXECUTE _sql;
END IF;
END;
$$ LANGUAGE plpgsql;