Moving to Single from Query

src/plate_automation.rs

@@ -28,16 +28,14 @@ pub fn update_automation_view(
 }
 
 pub fn update_automation(
-    mut query: Query<(&mut PlateAutomation, Entity)>,
+    mut query: Single<(&mut PlateAutomation, Entity)>,
     mut seeded_rng: ResMut<SeededRng>,
     keys: Res<ButtonInput<KeyCode>>,
     mut commands: Commands,
 ) {
-    if query.is_empty() {
-        return;
-    }
 
-    let (mut automation, entity) = query.iter_mut().next().unwrap();
+
+    let (mut automation, entity) = query.into_inner();
     if keys.just_pressed(KeyCode::Space) || keys.all_pressed([KeyCode::Space, KeyCode::ShiftLeft]) {
         let random = &mut seeded_rng.0;
 

src/seed_automation.rs

@@ -4,19 +4,17 @@ use crate::SeededRng;
 use bevy::asset::Assets;
 use bevy::image::Image;
 use bevy::input::ButtonInput;
-use bevy::prelude::{Commands, Component, Entity, KeyCode, Query, Res, ResMut, Sprite};
+use bevy::prelude::{Commands, Component, Entity, KeyCode, Query, Res, ResMut, Single, Sprite};
 use rand::RngExt;
 use rand_chacha::ChaCha8Rng;
 
 pub fn update_automation_view(
-    query: Query<(&Sprite, &SeedAutomation)>,
+    query: Single<(&Sprite, &SeedAutomation)>,
     mut images: ResMut<Assets<Image>>,
 ) {
-    if query.is_empty() {
-        return;
-    }
 
-    let (sprite, automation) = query.iter().next().unwrap();
+
+    let (sprite, automation) = query.into_inner();
     let image = automation.world.get_image_data();
 
 
@@ -25,16 +23,13 @@ pub fn update_automation_view(
 }
 
 pub fn update_automation(
-    mut query: Query<(&mut SeedAutomation, Entity)>,
+    mut query: Single<(&mut SeedAutomation, Entity)>,
     mut seeded_rng: ResMut<SeededRng>,
     keys: Res<ButtonInput<KeyCode>>,
     mut commands: Commands) {
+    
 
-    if query.is_empty() {
+    let  (mut automation, entity) = query.into_inner();
-        return;
-    }
-
-    let  (mut automation, entity) = query.iter_mut().next().unwrap();
 
     if keys.just_pressed(KeyCode::Space){
         let random = &mut seeded_rng.0;

src/subplate_automation.rs

@@ -199,18 +199,15 @@ impl SubPlateAutomation {
 }
 
 pub fn setup_hex_matrix(
-    request_query: Query<(&HexMatrixRequest, Entity)>,
+    request_query: Single<(&HexMatrixRequest, Entity)>,
-    view_query: Query<&Sprite, With<HexMatrixView>>,
+    view_query: Single<&Sprite, With<HexMatrixView>>,
-    mut automation_query: Query<&SubPlateAutomation>,
+    mut automation_query: Single<&SubPlateAutomation>,
     mut commands: Commands,
     mut images: ResMut<Assets<Image>>,
 ) {
-    if request_query.is_empty() {
-        return;
-    }
 
-    let entity = request_query.iter().next().unwrap().1;
+    let entity = request_query.into_inner().1;
-    let automation = automation_query.iter_mut().next().unwrap();
+    let automation = automation_query.into_inner();
     commands.entity(entity).despawn();
 
     println!("Seed hex matrix");
@@ -221,7 +218,7 @@ pub fn setup_hex_matrix(
 
     let image = hex_table.get_image_data();
 
-    let sprite = view_query.iter().next().unwrap();
+    let sprite = view_query.into_inner();
 
     // images.remove(sprite.image.id());
     images.insert(sprite.image.id(), image).unwrap();