step 2 with basic crud implemented

app/templates/items/form.html

@@ -0,0 +1,31 @@
+{% extends "base.html" %}
+
+{% block content %}
+<div class="page-header">
+    <div>
+        <h1>{{ page_title }}</h1>
+        <p class="muted">所属箱子：<a href="/boxes/{{ box.id }}">{{ box.name }}</a></p>
+    </div>
+    <a href="/boxes/{{ box.id }}">返回箱子</a>
+</div>
+
+<form method="post" action="{{ form_action }}" class="stack">
+    <label>
+        名称
+        <input type="text" name="name" value="{{ item.name if item else '' }}" required>
+    </label>
+    <label>
+        数量
+        <input type="number" name="quantity" min="0" value="{{ item.quantity if item and item.quantity is not none else '' }}">
+    </label>
+    <label class="checkbox-row">
+        <input type="checkbox" name="is_container" {% if item and item.is_container %}checked{% endif %}>
+        这个物品本身是一个小容器
+    </label>
+    <label>
+        备注
+        <textarea name="note" rows="4">{{ item.note if item and item.note else '' }}</textarea>
+    </label>
+    <button type="submit">{{ submit_label }}</button>
+</form>
+{% endblock %}