Add more flexibility to conservation policy update

src/data/base_request_handler.rs

@@ -357,7 +357,7 @@ pub trait BaseRequestHandler {
     }
 
     fn post_positive_u64_opt(&mut self, name: &str) -> Res<Option<u64>> {
-        match self.post_u64(name)? {
+        match self.post_u64_opt(name, 0)? {
             0 => Ok(None),
             val => Ok(Some(val))
         }

src/helpers/database.rs

@@ -944,6 +944,13 @@ pub fn update(u: UpdateInfo) -> ResultBoxError<()> {
 
     query_sql = format!("{} {} WHERE {}", query_sql, updates, conditions);
 
+    if conf().database.log_all_queries {
+        watcher::ExecDatabaseQuery::new(
+            &query_sql,
+            &values.iter().map(|f| mysql::Value::from(f)).collect(),
+        ).display();
+    }
+
     get_connection()?.exec_drop(
         query_sql,
         values,