Database access refactor (#190)

src-tauri/yaak-models/src/error.rs

@@ -1,3 +1,4 @@
+use serde::{Serialize, Serializer};
 use thiserror::Error;
 
 #[derive(Error, Debug)]
@@ -11,11 +12,29 @@ pub enum Error {
     #[error("JSON error: {0}")]
     JsonError(#[from] serde_json::Error),
 
-    #[error("Model not found {0}")]
+    #[error("Model not found: {0}")]
     ModelNotFound(String),
 
+    #[error("Model serialization error: {0}")]
+    ModelSerializationError(String),
+
+    #[error("Model error: {0}")]
+    GenericError(String),
+    
+    #[error("Row not found")]
+    RowNotFound,
+
     #[error("unknown error")]
     Unknown,
 }
 
+impl Serialize for Error {
+    fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        serializer.serialize_str(self.to_string().as_ref())
+    }
+}
+
 pub type Result<T> = std::result::Result<T, Error>;