[Python知识库]【Python Web】django框架（十）员工管理系统（用户管理）

员工管理系统（用户管理）

• 先手动输入一些数据

insert into  app01_userinfo(
	name,password,age,account,create_time,gender,depart_id) 
	values("zhang","123",20,10000000,"2022-9-1",1,1);

添加用户

原始方法

• 问题：
  1.用户提交数据没有校验
  2.页面输入错误应该有提示
  3.错误后，页面每一个数据都需要重新写
  4.关联的数据需要手动获取循环展示到页面
  
  

• Django组件

  • Form组件
    可以帮助我们解决前三个问题
  • ModelForm组件

初识Form

1. view.py

• 自动生成input框

class MyForm(Form):
	user = forms.CharFiled(widght=forms.Input)
	pwd = forms.CharFiled(widght=forms.Input)

def user_add(request):
    """添加用户(原始方法)"""
    if request.method == "GET":
        return render(request, 'user_add.html',{"form":form})

3. user_add.html

• 循环写

<form method="post">
	{% for field in form %}
		{{ field }}
	{% endfor %}
</form>

• 逐一写

<form method="post">
	{{ form.user }}
	{{ form.pwd }}
</form>

ModelForm(推荐)

1. models.py

class UserInfo(models.Model):
    """员工表"""
    name = models.CharField(verbose_name="姓名", max_length=16)
    password = models.CharField(verbose_name="密码", max_length=64)
    age = models.IntegerField(verbose_name="年龄")
    account = models.DecimalField(verbose_name="账户余额", max_digits=10, decimal_places=2, default=0)
    create_time = models.DateTimeField(verbose_name="入职时间")
    depart = models.ForeignKey(to="Department", to_field="id", on_delete=models.CASCADE)
    gender_choices = (
        (1, "男"),
        (2, "女")
    )
    gender = models.SmallIntegerField(verbose_name="性别", choices=gender_choices)

2. view.py

• 自动生成input框(可以自定义，也可以直接去拿78)

class MyForm(ModelForm):
	user = forms.CharFiled(widght=forms.Input)
	class Mete:
		model = UserInfo
		field = ["name","user","password","age"]

def user_add(request):
    """添加用户(原始方法)"""
    if request.method == "GET":
        return render(request, 'user_add.html',{"form":form})

• 设置settings.py 将默认文字为中文
  

员工管理系统（用户管理）

• user_model_form_add.html

{% extends 'layoyt.html' %}

{% block content %}
    <div class="container">
        <div class="panel panel-default">
            <div class="panel-heading">
                <h3 class="panel-title">新建用户</h3>
            </div>
            <div class="panel-body">
                <form method="post" novalidate>
                    {% csrf_token %}

                    {% for field in form %}
                        <div class="form-group">
                        <label>{{ field.label }}</label>
                        {{ field }}
                            <span style="color: red">
                                {{ field.errors.0 }}
                            </span>
                    </div>
                    {% endfor %}

                    <button type="submit" class="btn btn-primary">提 交</button>
                </form>
            </div>
        </div>
    </div>
{% endblock %}

• views.py

def user_model_form_add(request):
    """基于modelform的添加用户"""
    if request.method == "GET":
        form = UserModelForm
        return render(request,'user_model_form_add.html', {"form": form})

    # 用户POST提交数据，数据校验
    form = UserModelForm(data=request.POST)
    if form.is_valid():
        # 数据合法，保存到数据库
        # models.UserInfo.objects.create()
        form.save()
        return redirect("/user/list/")
    else:
        return render(request,'user_model_form_add.html', {"form": form})

补充编辑删除以后的代码

• 编辑用户
  • 点击编辑，跳转到编辑页面（将编辑行的id携带过去）
  • 错误校验
  • 数据库更新
• 删除用户

1. views.py

def user_edit(request, nid):
    """编辑页面"""
    if request.method == "GET":
        # 根据id获取要编辑的那一行数据
        row_object = models.UserInfo.objects.filter(id=nid).first()
        form = UserModelForm(instance=row_object)
        return render(request, 'user_edit.html', {'form':form})

    row_object = models.UserInfo.objects.filter(id=nid).first()
    form = UserModelForm(data=request.POST, instance=row_object)
    if form.is_valid():
        # 默认保存的是用户输入的数据
        form.save()
        return redirect('/user/list/')
    return render(request, 'user_edit.html', {"form": form})

def user_delete(request, nid):
    models.UserInfo.objects.filter(id=nid).first().delete()
    return redirect('/user/list')

2. user_model_form_edit.html

{% extends 'layoyt.html' %}

{% block content %}
    <div class="container">
        <div class="panel panel-default">
            <div class="panel-heading">
                <h3 class="panel-title">编辑用户</h3>
            </div>
            <div class="panel-body">
                <form method="post" novalidate>
                    {% csrf_token %}

                    {% for field in form %}
                        <div class="form-group">
                        <label>{{ field.label }}</label>
                        {{ field }}
                            <span style="color: red">
                                {{ field.errors.0 }}
                            </span>

                    </div>
                    {% endfor %}

                    <button type="submit" class="btn btn-primary">提 交</button>
                </form>
            </div>
        </div>
    </div>
{% endblock %}

3. 其它修改