style: use Self in error enum impls

src/errors/error.rs

@@ -11,7 +11,7 @@ pub enum Error {
 impl Display for Error {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         match self {
-            Error::ServerInternal => write!(f, "internal server error"),
+            Self::ServerInternal => write!(f, "internal server error"),
         }
     }
 }
@@ -22,7 +22,7 @@ impl FromStr for Error {
 
     fn from_str(s: &str) -> Result<Self, Self::Err> {
         Ok(match s {
-            "internal server error" => Error::ServerInternal,
+            "internal server error" => Self::ServerInternal,
             _ => return Err(()),
         })
     }

src/errors/project_error.rs

@@ -36,7 +36,7 @@ impl From<ValidationErrors> for ErrorVec<ProjectError> {
 
 impl From<diesel::result::Error> for ProjectError {
     fn from(_: diesel::result::Error) -> Self {
-        ProjectError::Error(Error::ServerInternal)
+        Self::Error(Error::ServerInternal)
     }
 }
 
@@ -52,6 +52,6 @@ impl FromStr for ProjectError {
     type Err = ();
 
     fn from_str(_: &str) -> Result<Self, Self::Err> {
-        Ok(ProjectError::Error(Error::ServerInternal))
+        Ok(Self::Error(Error::ServerInternal))
     }
 }

src/errors/task_error.rs

@@ -42,12 +42,12 @@ impl From<diesel::result::Error> for TaskError {
                 diesel::result::DatabaseErrorKind::ForeignKeyViolation, info
             ) => {
                 match info.constraint_name() {
-                    Some("tasks_project_id_fkey") => TaskError::ProjectNotFound,
-                    _ => TaskError::Error(Error::ServerInternal)
+                    Some("tasks_project_id_fkey") => Self::ProjectNotFound,
+                    _ => Self::Error(Error::ServerInternal)
                 }
             }
             _ => {
-                TaskError::Error(Error::ServerInternal)
+                Self::Error(Error::ServerInternal)
             }
         }
     }
@@ -65,6 +65,6 @@ impl FromStr for TaskError {
     type Err = ();
 
     fn from_str(_: &str) -> Result<Self, Self::Err> {
-        Ok(TaskError::Error(Error::ServerInternal))
+        Ok(Self::Error(Error::ServerInternal))
     }
 }