Question

嗨，我刚开始学习聚合物。我使用PHP收集如下数据。我可以将它嵌入到DIV中并显示一些数据，但是我想把这段代码变成一个Polymer元素，其中包含我可以导入的参数，json数据也可以用到我可以用来填充页面的外部Polymer元素。我正在努力开始，我知道这是基本的，但如果有人有指针让我在路上那将是伟大的。

<?php 
$host="host";
$username="username"; 
$password="password"; 
$db_name="database";
$db_query="SELECT * FROM table"; 

$mysqli = new mysqli("$host", "$username", "$password", "$db_name");
if ($mysqli->connect_errno) {
    echo "Failed to connect to MySQL: (" . $mysqli->connect_errno . ") " . $mysqli->connect_error;
}

$mysqli->real_query("$db_query");
$res = $mysqli->use_result();
$rows = array();
while ($row = $res->fetch_assoc()) {
    $rows[] = $row;
}
print json_encode($rows);

?>

Answer 1

如果我理解你需要在我的案例中创建服务元素：

<link rel="import" href="../../bower_components/polymer/polymer.html">
<link rel="import" href="../../bower_components/core-ajax/core-ajax.html">

<polymer-element name="category-service" attributes="categories">
    <template>
        <style>
        :host {
          display: none;
        }
        </style>
        <core-ajax id="ajax"
        auto
        url="../api/get_category_data.php"
        on-core-response="{{categoriesLoaded}}"
        handleAs="json">
        </core-ajax>
    </template>
    <script>
        Polymer('category-service',
        {
            created: function()
            {
                this.categories = [];
            },

            categoriesLoaded: function()
            {
                console.log('call cat loaded');
                this.categories = this.$.ajax.response.slice(0);
            }
        });
    </script>
</polymer-element>

然后你需要创建元素来显示数据

<link rel="import" href="../../bower_components/polymer/polymer.html">
<link rel="import" href="../../bower_components/paper-item/paper-item.html">
<link rel="import" href="category-service.html">

<polymer-element name="category-list" attributes="show">
    <template>
        <style>
        :host {
          display: block;
          width: 100%;
        }
        .paper_item 
        {
            margin: 10px;
            background-color: rgb(255, 255, 255);
        }
        </style>
        <category-service id="service" categories="{{categories}}"></category-service>

        <template repeat="{{category in categories}}">
            <paper-item label="{{category.category_name}}"
                        icon="settings"
                        class="paper_item"
                        center horizontal layout>
            </paper-item>
        </template>
    </template>
    <script>
        Polymer('category-list',
            {
            }
        );
    </script>
</polymer-element>

获取正确的数据

<?php

    require_once 'DB_Connect.php';

    $db = new DB_Connect();
    $db->connect();

    $result = mysql_query("SELECT * FROM ad_category") or die(mysql_error());

    while($row=mysql_fetch_assoc($result))
    $output[]=$row;
    print(json_encode($output));
    mysql_close();

?>

希望对你有所帮助

聚合物和PHP

1 个答案: