diff --git a/src/bin/admin.rs b/src/bin/admin.rs
index 326d003..307ad5a 100644
--- a/src/bin/admin.rs
+++ b/src/bin/admin.rs
@@ -46,7 +46,7 @@ pub enum AdminCommand {
 async fn handle_create_user(db_url: &str, new_user: NewUser) -> Result<()> {
     let mut db = establish_connection(db_url);
 
-    let user = users::Query::new(&mut db).create(new_user)?;
+    let user = users::q::create(&mut db, new_user)?;
     println!("User created successfully with id = {}", user.id);
 
     Ok(())
@@ -55,7 +55,7 @@ async fn handle_create_user(db_url: &str, new_user: NewUser) -> Result<()> {
 async fn handle_list_users(db_url: &str) -> Result<()> {
     let mut db = establish_connection(db_url);
 
-    let users = users::Query::new(&mut db).all()?;
+    let users = users::q::all(&mut db)?;
 
     println!("Found {} users.", users.len());
     for user in users {
diff --git a/src/handler/documents.rs b/src/handler/documents.rs
index e717d27..876fb46 100644
--- a/src/handler/documents.rs
+++ b/src/handler/documents.rs
@@ -98,7 +98,7 @@ pub async fn create_document_submit(
         "".to_owned(),
     );
 
-    let document = documents::query::create(&mut db, new_document).map_err(internal_error)?;
+    let document = documents::q::create(&mut db, new_document).map_err(internal_error)?;
     info!(?document, "document created");
 
     Ok(Redirect::to("/documents").into_response())
@@ -128,7 +128,7 @@ pub async fn edit_document_page(
         return Err((StatusCode::FORBIDDEN, "permission denied".to_owned()));
     }
 
-    let document = documents::query::by_id(&mut db, &id.to_string()).map_err(internal_error)?;
+    let document = documents::q::by_id(&mut db, &id.to_string()).map_err(internal_error)?;
     let projects =
         permissions::query::accessible_projects(&mut db, &user.id).map_err(internal_error)?;
 
@@ -172,7 +172,7 @@ pub async fn edit_document_submit(
         return Err((StatusCode::FORBIDDEN, "permission denied".to_owned()));
     }
 
-    documents::query::update(
+    documents::q::update(
         &mut db,
         &document_id.to_string(),
         form.title.to_owned(),
diff --git a/src/handler/projects.rs b/src/handler/projects.rs
index bfbd554..0768cbe 100644
--- a/src/handler/projects.rs
+++ b/src/handler/projects.rs
@@ -78,9 +78,9 @@ pub async fn create_project_submit(
     );
     // TODO: validation
 
-    let project = projects::query::create(&mut db, new_project).map_err(internal_error)?;
+    let project = projects::q::create(&mut db, new_project).map_err(internal_error)?;
 
-    let _ = project_memberships::query::create(&mut db, &user.id, &project.id, ProjectRole::Admin)
+    let _ = project_memberships::q::create(&mut db, &user.id, &project.id, ProjectRole::Admin)
         .map_err(internal_error)?;
 
     Ok(Redirect::to("/projects").into_response())
diff --git a/src/models.rs b/src/models.rs
index b7f9c23..a707258 100644
--- a/src/models.rs
+++ b/src/models.rs
@@ -3,7 +3,6 @@ use thiserror::Error;
 pub mod documents;
 pub mod project_memberships;
 pub mod projects;
-pub mod types;
 pub mod users;
 
 #[derive(Error, Debug)]
diff --git a/src/models/documents.rs b/src/models/documents.rs
index 2881056..0067275 100644
--- a/src/models/documents.rs
+++ b/src/models/documents.rs
@@ -38,41 +38,41 @@ impl NewDocument {
     }
 }
 
-pub mod query {
+pub mod q {
     use super::*;
 
     pub fn create(
-        db: &mut SqliteConnection,
+        conn: &mut SqliteConnection,
         new_document: NewDocument,
     ) -> Result<Document, DbError> {
-        diesel::insert_into(dsl::documents).values(&new_document).execute(db)?;
+        diesel::insert_into(dsl::documents).values(&new_document).execute(conn)?;
 
-        let document = dsl::documents.filter(dsl::id.eq(&new_document.id)).first(db)?;
+        let document = dsl::documents.filter(dsl::id.eq(&new_document.id)).first(conn)?;
 
         Ok(document)
     }
 
     pub fn update(
-        db: &mut SqliteConnection,
+        conn: &mut SqliteConnection,
         document_id: &str,
         title: String,
         content: String,
     ) -> Result<Document, DbError> {
         diesel::update(dsl::documents.filter(dsl::id.eq(document_id)))
             .set((dsl::title.eq(title), dsl::content.eq(content)))
-            .execute(db)?;
+            .execute(conn)?;
 
-        let document = dsl::documents.filter(dsl::id.eq(document_id)).first(db)?;
+        let document = dsl::documents.filter(dsl::id.eq(document_id)).first(conn)?;
 
         Ok(document)
     }
 
     pub fn by_id(
-        db: &mut SqliteConnection,
+        conn: &mut SqliteConnection,
         document_id: &str,
     ) -> Result<Option<Document>, DbError> {
         let document =
-            dsl::documents.filter(dsl::id.eq(document_id)).first::<Document>(db).optional()?;
+            dsl::documents.filter(dsl::id.eq(document_id)).first::<Document>(conn).optional()?;
 
         Ok(document)
     }
diff --git a/src/models/project_memberships.rs b/src/models/project_memberships.rs
index c60bf46..dc7388f 100644
--- a/src/models/project_memberships.rs
+++ b/src/models/project_memberships.rs
@@ -65,13 +65,13 @@ pub struct NewProjectMembership {
     pub role: ProjectRole,
 }
 
-pub mod query {
+pub mod q {
     use diesel::SqliteConnection;
 
     use super::*;
 
     pub fn create(
-        db: &mut SqliteConnection,
+        conn: &mut SqliteConnection,
         user_id: &str,
         project_id: &str,
         role: ProjectRole,
@@ -85,7 +85,7 @@ pub mod query {
         };
 
         let membership =
-            diesel::insert_into(pm::project_memberships).values(new_membership).get_result(db)?;
+            diesel::insert_into(pm::project_memberships).values(new_membership).get_result(conn)?;
 
         Ok(membership)
     }
diff --git a/src/models/projects.rs b/src/models/projects.rs
index 50cfb88..0db87c2 100644
--- a/src/models/projects.rs
+++ b/src/models/projects.rs
@@ -32,22 +32,22 @@ impl NewProject {
     }
 }
 
-pub mod query {
+pub mod q {
     use super::*;
 
-    pub fn for_user(db: &mut SqliteConnection, user_id: String) -> Result<Vec<Project>, DbError> {
+    pub fn for_user(conn: &mut SqliteConnection, user_id: String) -> Result<Vec<Project>, DbError> {
         let projects =
-            dsl::projects.filter(dsl::creator_id.eq(user_id.to_string())).load::<Project>(db)?;
+            dsl::projects.filter(dsl::creator_id.eq(user_id.to_string())).load::<Project>(conn)?;
         Ok(projects)
     }
 
     pub fn create(
-        db: &mut SqliteConnection,
+        conn: &mut SqliteConnection,
         new_project: NewProject,
     ) -> Result<Project, diesel::result::Error> {
         use crate::schema::projects::dsl as p;
 
-        let project = diesel::insert_into(p::projects).values(new_project).get_result(db)?;
+        let project = diesel::insert_into(p::projects).values(new_project).get_result(conn)?;
 
         Ok(project)
     }
diff --git a/src/models/types.rs b/src/models/types.rs
deleted file mode 100644
index 8b13789..0000000
--- a/src/models/types.rs
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/src/models/users.rs b/src/models/users.rs
index a16704e..eeb1aee 100644
--- a/src/models/users.rs
+++ b/src/models/users.rs
@@ -57,33 +57,28 @@ impl NewUser {
     }
 }
 
-pub struct Query<'a> {
-    db: &'a mut SqliteConnection,
-}
-impl<'a> Query<'a> {
-    pub fn new(db: &'a mut SqliteConnection) -> Self {
-        Self { db }
-    }
+pub mod q {
+    use super::*;
 
-    pub fn all(&mut self) -> Result<Vec<User>, DbError> {
-        let user_list = dsl::users.load::<User>(self.db)?;
+    pub fn all(conn: &mut SqliteConnection) -> Result<Vec<User>, DbError> {
+        let user_list = dsl::users.load::<User>(conn)?;
         Ok(user_list)
     }
 
-    pub fn by_id(&mut self, id: &str) -> Result<User, DbError> {
-        let user = dsl::users.filter(dsl::id.eq(id)).first::<User>(self.db)?;
+    pub fn by_id(conn: &mut SqliteConnection, id: &str) -> Result<User, DbError> {
+        let user = dsl::users.filter(dsl::id.eq(id)).first::<User>(conn)?;
         Ok(user)
     }
 
-    pub fn by_username(&mut self, username: &str) -> Result<User, DbError> {
-        let user = dsl::users.filter(dsl::username.eq(username)).first::<User>(self.db)?;
+    pub fn by_username(conn: &mut SqliteConnection, username: &str) -> Result<User, DbError> {
+        let user = dsl::users.filter(dsl::username.eq(username)).first::<User>(conn)?;
         Ok(user)
     }
 
-    pub fn create(&mut self, new_user: NewUser) -> Result<User, DbError> {
-        let _ = diesel::insert_into(dsl::users).values(&new_user).execute(self.db)?;
+    pub fn create(conn: &mut SqliteConnection, new_user: NewUser) -> Result<User, DbError> {
+        let _ = diesel::insert_into(dsl::users).values(&new_user).execute(conn)?;
 
-        let new_user = dsl::users.filter(dsl::id.eq(&new_user.id)).first::<User>(self.db)?;
+        let new_user = dsl::users.filter(dsl::id.eq(&new_user.id)).first::<User>(conn)?;
 
         Ok(new_user)
     }
diff --git a/src/session.rs b/src/session.rs
index 05c42f0..197cb84 100644
--- a/src/session.rs
+++ b/src/session.rs
@@ -34,9 +34,7 @@ impl AuthnBackend for Provider {
         creds: Self::Credentials,
     ) -> Result<Option<Self::User>, Self::Error> {
         let mut db = self.db_pool.get()?;
-        let mut q = users::Query::new(&mut db);
-
-        let user = q.by_username(&creds.username)?;
+        let user = users::q::by_username(&mut db, &creds.username)?;
 
         if password::verify(&user.password_hash, &creds.password) {
             Ok(Some(user))
@@ -47,9 +45,7 @@ impl AuthnBackend for Provider {
 
     async fn get_user(&self, user_id: &UserId<Self>) -> Result<Option<Self::User>, Self::Error> {
         let mut db = self.db_pool.get()?;
-        let mut q = users::Query::new(&mut db);
-
-        let user = q.by_id(user_id)?;
+        let user = users::q::by_id(&mut db, user_id)?;
 
         Ok(Some(user))
     }