bug fix: zero division error

.idea/workspace.xml

@@ -10,12 +10,10 @@
     <cargoProject FILE="$PROJECT_DIR$/bookkeeper/Cargo.toml" />
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="76b3b902-7a5c-4bcd-9c1b-8241d748fb44" name="更改" comment="添加总计">
-      <change afterPath="$PROJECT_DIR$/bookkeeper/templates/login.html.j2" afterDir="false" />
+    <list default="true" id="76b3b902-7a5c-4bcd-9c1b-8241d748fb44" name="更改" comment="添加登录页面">
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/bookkeeper/Cargo.lock" beforeDir="false" afterPath="$PROJECT_DIR$/bookkeeper/Cargo.lock" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/bookkeeper/Cargo.toml" beforeDir="false" afterPath="$PROJECT_DIR$/bookkeeper/Cargo.toml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/bookkeeper/Rocket.toml" beforeDir="false" afterPath="$PROJECT_DIR$/bookkeeper/Rocket.toml" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/bookkeeper/src/main.rs" beforeDir="false" afterPath="$PROJECT_DIR$/bookkeeper/src/main.rs" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
@@ -23,7 +21,7 @@
     <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
     <option name="LAST_RESOLUTION" value="IGNORE" />
   </component>
-  <component name="ExecutionTargetManager" SELECTED_TARGET="RsBuildProfile:dev" />
+  <component name="ExecutionTargetManager" SELECTED_TARGET="RsBuildProfile:release" />
   <component name="FileTemplateManagerImpl">
     <option name="RECENT_TEMPLATES">
       <list>
@@ -84,7 +82,7 @@
   </component>
   <component name="RunManager" selected="Cargo.Run bookkeeper">
     <configuration name="Run bookkeeper" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
-      <option name="buildProfileId" value="dev" />
+      <option name="buildProfileId" value="release" />
       <option name="command" value="run --package bookkeeper --bin bookkeeper" />
       <option name="workingDirectory" value="file://$PROJECT_DIR$/bookkeeper" />
       <envs />
@@ -158,7 +156,7 @@
       <workItem from="1736239592084" duration="2278000" />
       <workItem from="1737809478583" duration="76000" />
       <workItem from="1739197188908" duration="1873000" />
-      <workItem from="1740209396270" duration="4798000" />
+      <workItem from="1740209396270" duration="6029000" />
     </task>
     <task id="LOCAL-00001" summary="Add bookkeeper">
       <option name="closed" value="true" />
@@ -272,7 +270,15 @@
       <option name="project" value="LOCAL" />
       <updated>1739198426101</updated>
     </task>
-    <option name="localTasksCounter" value="15" />
+    <task id="LOCAL-00015" summary="添加登录页面">
+      <option name="closed" value="true" />
+      <created>1740214793630</created>
+      <option name="number" value="00015" />
+      <option name="presentableId" value="LOCAL-00015" />
+      <option name="project" value="LOCAL" />
+      <updated>1740214793630</updated>
+    </task>
+    <option name="localTasksCounter" value="16" />
     <servers />
   </component>
   <component name="TypeScriptGeneratedFilesManager">
@@ -304,7 +310,8 @@
     <MESSAGE value="更新版本号和部署脚本" />
     <MESSAGE value="清仓筛选" />
     <MESSAGE value="添加总计" />
-    <option name="LAST_COMMIT_MESSAGE" value="添加总计" />
+    <MESSAGE value="添加登录页面" />
+    <option name="LAST_COMMIT_MESSAGE" value="添加登录页面" />
   </component>
   <component name="XSLT-Support.FileAssociations.UIState">
     <expand />

bookkeeper/Cargo.lock

@@ -481,7 +481,7 @@ dependencies = [
 
 [[package]]
 name = "bookkeeper"
-version = "0.2.0"
+version = "0.2.1"
 dependencies = [
  "bcrypt",
  "chrono",

bookkeeper/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "bookkeeper"
-version = "0.2.0"
+version = "0.2.1"
 edition = "2021"
 
 [dependencies]

bookkeeper/src/main.rs

@@ -1,3 +1,4 @@
+use rust_decimal::prelude::Zero;
 #[macro_use]
 extern crate rocket;
 
@@ -235,8 +236,16 @@ async fn index(
         }
     }
 
-    let pct = gain / bought;
-    let net_pct = net_gain / net_bought;
+    let pct = if bought.is_zero() {
+        Decimal::zero()
+    } else {
+        gain / bought
+    };
+    let net_pct = if net_bought.is_zero() {
+        Decimal::zero()
+    } else {
+        net_gain / net_bought
+    };
 
     Ok(Template::render(
         "index",