Подключение к Postgres и тестовый эндпоинт авторизации

src/database/mod.rs

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+pub mod schema;
+pub mod models;

src/database/models.rs

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+use diesel::prelude::*;
+use serde::Serialize;
+
+#[derive(diesel_derive_enum::DbEnum, Serialize, Debug)]
+#[ExistingTypePath = "crate::database::schema::sql_types::UserRole"]
+#[DbValueStyle = "UPPERCASE"]
+#[serde(rename_all = "UPPERCASE")]
+pub enum UserRole {
+    Student,
+    Teacher,
+    Admin,
+}
+
+#[derive(Queryable, Selectable, Serialize)]
+#[diesel(table_name = crate::database::schema::users)]
+#[diesel(check_for_backend(diesel::pg::Pg))]
+pub struct User {
+    pub id: String,
+    pub username: String,
+    pub password: String,
+    pub vk_id: Option<i32>,
+    pub access_token: String,
+    pub group: String,
+    pub role: UserRole,
+    pub version: String,
+}

src/database/schema.rs

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+// @generated automatically by Diesel CLI.
+
+pub mod sql_types {
+    #[derive(diesel::query_builder::QueryId, Clone, diesel::sql_types::SqlType)]
+    #[diesel(postgres_type(name = "user_role"))]
+    pub struct UserRole;
+}
+
+diesel::table! {
+    fcm (user_id) {
+        user_id -> Text,
+        token -> Text,
+        topics -> Nullable<Array<Nullable<Text>>>,
+    }
+}
+
+diesel::table! {
+    use diesel::sql_types::*;
+    use super::sql_types::UserRole;
+
+    users (id) {
+        id -> Text,
+        username -> Text,
+        password -> Text,
+        vk_id -> Nullable<Int4>,
+        access_token -> Text,
+        group -> Text,
+        role -> UserRole,
+        version -> Text,
+    }
+}
+
+diesel::joinable!(fcm -> users (user_id));
+
+diesel::allow_tables_to_appear_in_same_query!(
+    fcm,
+    users,
+);