Node.js和Ejs，如何处理2个表？
[英]Node.js & ejs, how to handle 2 tables?
问题描述
Here is a question about node.js that I need to answer. 
这是我需要回答的有关node.js问题。 Since I am still a beginner in the field, it may actually be quite easy. 由于我仍然是该领域的初学者，因此实际上可能很容易。
Following some documentation that I found online, I have this code (inside a file called index.js): 在网上找到一些文档之后，我有了这段代码（在一个名为index.js的文件中）：
app.get('/db', function (request, response) {
pg.connect(process.env.DATABASE_URL, function(err, client, done) {
client.query('SELECT * FROM test_table', function(err, result) {
done();
if (err)
{ console.error(err); response.send("Error " + err); }
else {
response.render('pages/db', {results: result.rows} );
}
});
});
});
and I also have this other file called db.ejs: 而且我还有另一个名为db.ejs的文件：
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<div class="container">
<h2>Database Results</h2>
<ul>
<% results.forEach(function(r) { %>
<li><%= r.id %> - <%= r.name %></li>
<% }); %>
</ul>
</div>
</body>
</html>
By some magic between the two I can display the contents of test_table. 通过两者之间的某种魔术，我可以显示test_table的内容。 It works as one would expect. 正如人们所期望的那样。
Now here comes my question: 现在是我的问题：
Along with the query: 'SELECT * FROM test_table' I also want to add a second query: 'SELECT * FROM other_test_table' and I want to be able to display the contents of other_test_table after (or before) that of test_table. 除了查询： “ SELECT * FROM test_table”之外，我还想添加第二个查询： “ SELECT * FROM other_test_table”，并且我希望能够在test_table之后（或之前）显示other_test_table的内容。 How do I need to change the code in both places for that? 我该如何在两个地方都更改代码？
1 个解决方案
解决方案1
0 已采纳 2016-11-14 05:04:17
You can try: 你可以试试：
app.get('/db', function (request, response) {
pg.connect(process.env.DATABASE_URL, function(err, client, done) {
client.query('SELECT * FROM test_table', function(err, result1) {
if (err) {
done();
console.error(err);
response.send("Error: " + err.message);
} else {
client.query('SELECT * FROM other_test_table', function(err, result2) {
done();
if (err) {
console.error(err);
response.send("Error: " + err.message);
} else {
response.render('pages/db', {
results1: result1.rows,
results2: result2.rows
});
}
});
}
});
});
});
and in db.ejs : 并在db.ejs ：
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<div class="container">
<h2>Database Results</h2>
<ul>
<% results1.forEach(function(r) { %>
<li><%= r.id %> - <%= r.name %></li>
<% }); %>
</ul>
<ul>
<% results2.forEach(function(r) { %>
<li><%= r.id %> - <%= r.name %></li>
<% }); %>
</ul>
</div>
</body>
</html>
Hope it helps. 希望能帮助到你。
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