抱歉,这是一个愚蠢的问题,我表示和mongodb / mongoose超级陌生,所以不确定我在做什么错。我正在尝试提供一些下拉菜单,用户可以在其中从每个下拉菜单中进行选择,然后单击“提交”以向我的数据库发送POST请求。我使用它来输入您自己的数据的表单,但是我只希望用户能够从下拉菜单中进行选择...
这是我尝试从以下位置创建POST请求的下拉表单:
<form action="/environments" method="POST"></form>
<select>
<% environments.forEach(function(environment){ %>
<option value="name"><%= environment.name %></option>
<% }); %>
</select>
<select>
<% environments.forEach(function(environment){ %>
<option value="region"><%= environment.region %></option>
<% }); %>
</select>
<input type="submit" />
</form>
这是我的app.js
var express = require("express"),
app = express(),
mongoose = require("mongoose"),
bodyParser = require("body-parser");
mongoose.connect("mongodb://localhost/epims", {
useNewUrlParser: true,
useUnifiedTopology: true
});
app.use(bodyParser.urlencoded({ extended: true }));
app.set("view engine", "ejs");
//schema setup
var environmentSchema = new mongoose.Schema({
name: String,
region: String
});
var Environment = mongoose.model("Environment", environmentSchema);
//DISPLAY ALL ENVIRONMENTS IN DB
app.get("/environments", function(req, res) {
//get all environments from db
Environment.find({}, function(err, allEnvironments) {
if (err) {
console.log(err);
} else {
res.render("environments", { environments: allEnvironments });
}
});
});
//POST FORM DATA TO DB
app.post("/environments", function(req, res) {
//get data from form and add to db
var name = req.body.name;
var region = req.body.region;
var newEnvironment = { name: name, region: region };
//create new env and save to db
Environment.create(newEnvironment, function(err, newlyCreated) {
if (err) {
console.log(err);
} else {
//redirect back to environments
res.redirect("/environments");
}
});
});
您必须为每个选择标签设置名称。对于您的情况,它将是name
和region
,因为这是您要回发到服务器的值。
然后,在每个option
标记的每个select
标记中,您必须为其设置值,如果设置<option value="name"><%= environment.name %></option>
,则意味着对于每个选择,您总是获得的值为name
。
最后,ejs代码(我认为是这样:
<form action="/environments" method="POST"></form>
<select name="name">
<% environments.forEach(function(environment){ %>
<option value="<%= environment.name %>"><%= environment.name %></option>
<% }); %>
</select>
<select name="region">
<% environments.forEach(function(environment){ %>
<option value="<%= environment.region %>"><%= environment.region %></option>
<% }); %>
</select>
<input type="submit" />
</form>