EJS variable not define in html

Question

I'm trying to read a JSON file from my database. Here is the rendered page.

    <% newcompose.forEach(function(post){ %>

        <h1><%= post.caption %></h1>
        <p><%= post.text %></p>

    <% }); %>

And this is how i'm passing the value into newcompose.

Post.find({}, function(err, posts){
    if(!err){
        res.render("home", {newcompose: posts});
    }
});

It says newcompose not defined but if I add <% var newcompose; %> to home then it says forEach not defined. also I'm using mongoose.

have you determined that posts has a value

Jaromanda X
– Jaromanda X

2020-09-02 02:44:33 +00:00
Commented Sep 2, 2020 at 2:44 — Jaromanda X
– Jaromanda X, Commented Sep 2, 2020 at 2:44

Russopotomus · Accepted Answer · 2020-09-02 03:16:10Z

1

I tested your template using the following code:

const ejs = require('ejs');

let template = `
<%newcompose.forEach(function(post){%>
    <h1><%=post.caption%></h1>
    <p><%=post.text%></p>
<%});%>
`;

const renderData = {
    newcompose: [
        {
            caption: "test caption",
            text: "test text",
        }
    ]
};
const output = ejs.render(template, renderData);

console.log(output);

output was:

    <h1>test caption</h1>
    <p>test text</p>

So your template is fine. This implies that the problem is with your find function, or how you are handling the callback parameters.

If you are using mongo, this is likely because find returns a cursor, so you need to explicitly call the toArray function like this:

collection.find().toArray(function(err, documents) {

As per: https://mongodb.github.io/node-mongodb-native/api-generated/cursor.html

edited Sep 2, 2020 at 3:16

answered Sep 2, 2020 at 2:47

Russopotomus

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1 Comment

Russopotomus Over a year ago

@Maurice - Ok, if my answer was helpful I would appreciate it if you could 'accept' it. Thanks.

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