handle the error of the malformed time in database

src/database.rs

@@ -203,17 +203,30 @@ impl Database for SqliteDatabase {
     fn entry_query(&self, query: &str, params: &[&dyn ToSql]) -> Result<Vec<Entry>> {
         let mut stmt = self.connection.prepare(query)?;
 
-        let results = stmt.query_map(params, |row| {
-            Ok(Entry {
-                id: row.get("id")?,
-                note: row.get("note")?,
-                start: row.get("start")?,
-                end: row.get("end")?,
-                sheet: row.get("sheet")?,
-            })
-        })?.filter_map(|r| r.ok()).collect();
+        let x = stmt.query_and_then(params, |row| {
+            let id: u64 = row.get("id")?;
+            let note = row.get("note")?;
+            let sheet = row.get("sheet")?;
 
-        Ok(results)
+            let start = row.get("start").map_err(|_| {
+                Error::InvalidTimeInDatabase {
+                    id: id.to_string(),
+                    col: "start".into(),
+                }
+            })?;
+            let end = row.get("start").map_err(|_| {
+                Error::InvalidTimeInDatabase {
+                    id: id.to_string(),
+                    col: "start".into(),
+                }
+            })?;
+
+            Ok(Entry {
+                id, note, start, end, sheet,
+            })
+        })?.collect();
+
+        x
     }
 
     fn meta_query(&self, query: &str, params: &[&dyn ToSql]) -> Result<Vec<Meta>> {

src/error.rs

@@ -54,6 +54,22 @@ pub enum Error {
 
     #[error("Could not understand '{0}' as a month specifier. Try 'this', 'last', or any month name like 'january' or 'nov'")]
     InvalidMonthSpec(String),
+
+    #[error("An error ocurred while trying to read entries from the database.
+
+In the row with id {id} the data at column '{col}' has a value that is not a
+valid time.
+
+A valid time looks like this: '2021-07-12 19:35:43.645916' and must be in UTC
+timezone (unless you are using a database that was created by timetrap, case in
+which the times are in the local timezone).
+
+To fix this problem you can use t backend and manually update the value using
+good old SQL.")]
+    InvalidTimeInDatabase {
+        id: String,
+        col: String,
+    },
 }
 
 pub type Result<T> = result::Result<T, Error>;