是否有可能通过使用POST变量在Mako模板中分配图像的src？

问题描述 投票：2回答：2

我目前在这个问题上仍然处于困境，我似乎无法弄清楚...我已经使用CherryPy创建了一个小型Web应用程序，并且已将Mako用于html模板。一切都与一个MySQL数据库绑定，该数据库几乎包含一个汽车清单。我的问题如下：我正在使用POST表单，以便从主页导航到car部分并指定特定的汽车品牌。到达该页面后，我将根据数据库中POST中的条件加载所有汽车。该变量包含从数据库中提取的所有行。然后，我继续遍历行列表以显示每辆汽车的信息等，但是我似乎找不到找到将每张图片与其对应的汽车联系起来的方法。我的想法是生成指向img文件夹（../img/cars/）的路径，并将其与car id +文件扩展名连接起来，但这似乎不起作用...（我的图片另存为1 .jpg，2.jpg等-每个数字代表汽车ID）。

index.html：

    <!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title></title>
    <meta name="keywords" content="" />
    <meta name="description" content="" />
    <link href="../css/style.css" rel="stylesheet">




</head>

<body>

<div class="wrapper">



        <div class="topnav" id="myTopnav">

            <a href="index" id="logolink">
                <img alt="AutoRIL" src="../img/logo_transparent.png" width="75" height="75">
            </a>

            <a href="index" id="link" class="active">Home</a>
            <a href="#news" id="link">News</a>
            <a href="contact" id="link">Contact</a>
            <a href="about" id="link">About</a>

          </div>



          <div class ="pageinfo">


            <img src="../img/slides/slide1.jpg" alt="BMW">
            <img src="../img/slides/slide2.jpg" alt="Audi">



          </div>




          <div class="pagecontent">

                <h1>Show cars by Category</h1>



                <div class="row">
                    <div class="column">
                      <div class="card">
                        <img src="../img/categories/hatchback.png" alt="Hatchback" style="width:200px; height:200px;">
                        <div class="container">
                          <h2>Hatchback</h2>
                          <p>Agile due its reduced size.</p>
                          <form action="displaybycategory" method="POST">
                            <p><button class="button" type="submit" name="category" value="hatchback" >Check available models</button></p>
                        </form>
                        </div>
                      </div>
                    </div>

                    <div class="column">
                      <div class="card">
                        <img src="../img/categories/suv.png" alt="SUV" style="width:200px; height:200px;">
                        <div class="container">
                          <h2>SUV</h2>
                          <p>Extremely versatile due to its power and utility.</p>
                          <form action="displaybycategory" method="POST">
                            <p><button class="button" type="submit" name="category" value="suv" >Check available models</button></p>
                        </form>
                        </div>
                      </div>
                    </div>

                    <div class="column">
                      <div class="card">
                        <img src="../img/categories/sedan.png" alt="Sedan" style="width:200px; height:200px;">
                        <div class="container">
                          <h2>Sedan</h2>
                          <p>Enough space to fit all needs.</p>
                          <form action="displaybycategory" method="POST">
                            <p><button class="button" type="submit" name="category" value="sedan" >Check available models</button></p>
                        </form>
                        </div>
                      </div>
                    </div>
                  </div> 



                  <div class="row">
                    <div class="column">
                      <div class="card">
                        <img src="../img/categories/convertible.png" alt="Convertible" style="width:200px; height:200px;">
                        <div class="container">
                          <h2>Convertible</h2>
                          <p>Gives you all the freedom you deserve.</p>
                          <form action="displaybycategory" method="POST">
                            <p><button class="button" type="submit" name="category" value="convertible" >Check available models</button></p>
                        </form>
                        </div>
                      </div>
                    </div>

                    <div class="column">
                      <div class="card">
                        <img src="../img/categories/coupe.png" alt="Coupe" style="width:200px; height:200px;">
                        <div class="container">
                          <h2>Coupe</h2>
                          <p>Sporty looks, aggressive driving.</p>
                          <form action="displaybycategory" method="POST">
                            <p><button class="button" type="submit" name="category" value="coupe" >Check available models</button></p>
                        </form>
                        </div>
                      </div>
                    </div>

                    <div class="column">
                      <div class="card">
                        <img src="../img/categories/sports.png" alt="Sports" style="width:200px; height:200px;">
                        <div class="container">
                          <h2>Sports</h2>
                          <p>City conqueror, track monster.</p>
                          <form action="displaybycategory" method="POST">
                            <p><button class="button" type="submit" name="category" value="sports" >Check available models</button></p>
                        </form>
                        </div>
                      </div>
                    </div>
                  </div>



                  <h1>Show cars by Make</h1>


                  <form action="displaybymake" method="POST">

                  <table style="width:100%" id="carmakes">
                    <tr>
                      <td><p><button class="button" type="submit" name="make" value="Audi" >Audi</button></p></td>
                      <td><p><button class="button" type="submit" name="make" value="Fiat" >Fiat</button></p></td>
                      <td><p><button class="button" type="submit" name="make" value="Hyundai" >Hyundai</button></p></td>
                      <td><p><button class="button" type="submit" name="make" value="Mazda" >Mazda</button></p></td>
                      <td><p><button class="button" type="submit" name="make" value="Nissan" >Nissan</button></p></td>
                      <td><p><button class="button" type="submit" name="make" value="Toyota" >Toyota</button></p></td>
                    </tr>
                    <tr>
                      <td><p><button class="button" type="submit" name="make" value="BMW" >BMW</button></p></td>
                      <td><p><button class="button" type="submit" name="make" value="Ford" >Ford</button></p></td>
                      <td><p><button class="button" type="submit" name="make" value="Kia" >Kia</button></p></td>
                      <td><p><button class="button" type="submit" name="make" value="Mercedes-Benz" >Mercedes-Benz</button></p></td>
                      <td><p><button class="button" type="submit" name="make" value="Porsche" >Porsche</button></p></td>
                      <td><p><button class="button" type="submit" name="make" value="Volkswagen" >Volkswagen</button></p></td>
                    </tr>
                    <tr>
                      <td><p><button class="button" type="submit" name="make" value="Chevrolet" >Chevrolet</button></p></td>
                      <td><p><button class="button" type="submit" name="make" value="Honda" >Honda</button></p></td>
                      <td><p><button class="button" type="submit" name="make" value="Range Rover" >Range Rover</button></p></td>
                      <td><p><button class="button" type="submit" name="make" value="Mitsubishi" >Mitsubishi</button></p></td>
                      <td><p><button class="button" type="submit" name="make" value="Subaru" >Subaru</button></p></td>
                      <td><p><button class="button" type="submit" name="make" value="Volvo" >Volvo</button></p></td>
                    </tr>
                  </table>

                  </form>



          </div>





</div>

</body>
</html>

carcategory.html

    <!DOCTYPE html>

<html>

    <link href="../css/carcategory.css" rel="stylesheet">

    <div class="uppercontent">



        <a href="index" id="logolink">
            <img alt="AutoRIL" src="../img/logo_transparent.png" width="75" height="75">
        </a>

        <h2>Current category: ${categ}</h2>
        <hr>

    </div>


        <table><tr>




        % for a in mydata:

            % if loop.index % 3 == 0:

                </tr><tr><td>

                    <div class="card" style="margin-left: 125px;">
                        <img src="../img/cars/1.jpg" alt="Car" style="width:200px; height: 200px;">
                        <h1>${a[1]}</h1>
                        <p>${a[2]}</p>
                        <p class="price">EUR ${a[4]}</p>
                        <p><button>Check it out</button></p>
                    </div> 


                </td>


            % elif loop.index %3 != 0:


                <td>

                    <div class="card">
                        <img src="../img/cars/1.jpg" alt="Car" style="width:200px; height: 200px;">
                        <h1>${a[1]}</h1>
                        <p>${a[2]}</p>
                        <p class="price">EUR ${a[4]}</p>
                        <p><button>Check it out</button></p>
                    </div> 


                </td>

        % endif       


        % endfor


</html>

start.py：

    import cherrypy
import mysql.connector
from mysql.connector import errorcode
import os
from mako.template import Template
from mako.lookup import TemplateLookup


path = os.path.abspath(os.path.dirname(__file__))

lookup = TemplateLookup(directories=[os.path.join(path, 'html')])


mydb = mysql.connector.connect(
  host="localhost",
  user="root",
  password="luk610",
  database="siteril"
)



class MainPage(object):

    @cherrypy.expose
    def index(self):
        template = lookup.get_template('index.html')
        return template.render()

    index.exposed = True

    @cherrypy.expose
    def displaybycategory(self, category):
        template = lookup.get_template('carcategory.html')

        mycursor = mydb.cursor()

        payload = 'SELECT * FROM cars WHERE category=' + '"' + category + '"'

        mycursor.execute(payload)

        result = mycursor.fetchall()

        return template.render(mydata=result, categ=category)

    displaybycategory.exposed = True

    @cherrypy.expose
    def displaybymake(self, make):
        template = lookup.get_template('carmake.html')

        mycursor = mydb.cursor()

        payload = 'SELECT * FROM cars WHERE make=' + '"' + make + '"'

        mycursor.execute(payload)

        result = mycursor.fetchall()

        return template.render(mydata=result)

    displaybycategory.exposed = True

    @cherrypy.expose
    def about(self):
        template = lookup.get_template('about.html')
        return template.render()

    about.exposed = True

    @cherrypy.expose
    def contact(self):
        template = lookup.get_template('contact.html')
        return template.render()

    contact.exposed = True

if __name__ == '__main__':

    conf_path_root = os.path.dirname(os.path.abspath(__file__))
    conf_path = os.path.join(conf_path_root, "config.conf")
    cherrypy.config.update(conf_path)

    cherrypy.tree.mount(MainPage(), '/', config=conf_path)
    cherrypy.engine.start()
    cherrypy.engine.block()

这里应该是这样：src =“ ../ img / cars / {a [0]}。jpg”，其中{a [0]}带有汽车ID

如果没有添加任何内容，或者没有明确说明，我深表歉意。我是这个东西的完整初学者，任何帮助/建议将不胜感激。谢谢！

python html mysql-python cherrypy mako
2个回答
1
投票

我认为您应该尝试使用JavaScript替代问题。

强烈建议您使用字符串串联运算符(+, +=)代替其他方法来执行此操作。

0
投票

我发现的唯一临时解决方案是通过多个if语句对图片选择进行硬编码...（是的，我知道..：D），像这样：

                      % if a[0] == 1:
                        <img src="../img/cars/1.jpg" alt="Car" style="width:200px; height: 200px;">
                      % elif a[0] == 2:
                        <img src="../img/cars/2.jpg" alt="Car" style="width:200px; height: 200px;">
                      % elif a[0] == 3:
                        <img src="../img/cars/3.jpg" alt="Car" style="width:200px; height: 200px;">
                      % elif a[0] == 4:
                        <img src="../img/cars/4.jpg" alt="Car" style="width:200px; height: 200px;">
                      % elif a[0] == 5:
                        <img src="../img/cars/5.jpg" alt="Car" style="width:200px; height: 200px;">
                      % elif a[0] == 6:
                        <img src="../img/cars/6.jpg" alt="Car" style="width:200px; height: 200px;">
                      % elif a[0] == 7:
                        <img src="../img/cars/7.jpg" alt="Car" style="width:200px; height: 200px;">
                      % elif a[0] == 8:
                        <img src="../img/cars/8.jpg" alt="Car" style="width:200px; height: 200px;">
                      % elif a[0] == 9:
                        <img src="../img/cars/9.jpg" alt="Car" style="width:200px; height: 200px;">
                      % elif a[0] == 10:
                        <img src="../img/cars/10.jpg" alt="Car" style="width:200px; height: 200px;">
                      % elif a[0] == 11:
                        <img src="../img/cars/11.jpg" alt="Car" style="width:200px; height: 200px;">
                      % elif a[0] == 12:
                        <img src="../img/cars/12.jpg" alt="Car" style="width:200px; height: 200px;">
                      % elif a[0] == 13:
                        <img src="../img/cars/13.jpg" alt="Car" style="width:200px; height: 200px;">
                      % elif a[0] == 14:
                        <img src="../img/cars/14.jpg" alt="Car" style="width:200px; height: 200px;">
                      % elif a[0] == 15:
                        <img src="../img/cars/15.jpg" alt="Car" style="width:200px; height: 200px;">
                      % elif a[0] == 16:
                        <img src="../img/cars/16.jpg" alt="Car" style="width:200px; height: 200px;">
                      % elif a[0] == 17:
                        <img src="../img/cars/17.jpg" alt="Car" style="width:200px; height: 200px;">
                      % elif a[0] == 18:
                        <img src="../img/cars/18.jpg" alt="Car" style="width:200px; height: 200px;">
                      % elif a[0] == 19:
                        <img src="../img/cars/19.jpg" alt="Car" style="width:200px; height: 200px;">
                      % elif a[0] == 20:
                        <img src="../img/cars/20.jpg" alt="Car" style="width:200px; height: 200px;">
                        %endif

我知道这确实很糟糕，但是我似乎仍然找不到找到使用变量以将其用作src属性的方法。

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