How to concatenate HREF to get id from database? - node.js

NodeJS, Mongoose
<% for(var i = 0; i < articles.length; i++){ %>
<ul class="list-group">
<li class="list-group-item">
<a href="/article/<%=articles._id%>">
<%= articles[i].title %>
</a>
</li>
</ul>
<% } %>
<% include partials/html-footer %>
How do I make it go to /articles/articles._id? I've tried -
<a href="/article/"+<%=articles._id%>>
as well. If there's anything else you need to see, let me know. Don't know what else to post.

You are missing the array index:
<a href="/article/<%= articles[i]._id %>">

Related

File type:ejs.I have a problem with syntacxis

<ul>
<% if ('contacts'.length) { %> <% 'contacts'.forEach(({ link, name }) => { -%>
<li>
<%= name %>
</li>
<% }) %> <% } %>
</ul>
I have a syntacxis problem with this part of ejs file.What would be the correct syntax?
I try ejslint,but he doesnt support me

how to display array values in a list using ejs

I have an array
{"count":3,"rows":[{"p_id":"P1","gender":"M","patient_name":"a"},{"p_id":"D1","gender":"M","patient_name":"Davin"},{"p_id":"M1","gender":"M","patient_name":"Marv"}]}
Which I render from my express to my ejs file. I have a profile card in which I need to display each string in list. so for 3 strings 3 cards.
my ejs file:
<ul>
<% for(var i= 0 ; i < userData.length; i++) {%>
<li>
<span><%=userData[i].count %>
</li>
<ul>
<% for(var j=0 ; j < userData[i].rows.length; j++) {%>
<li>
<span><%=userData[i].rows[j].p_id %>
</li>
<% } %>
</ul>
<% } %>
</ul>
You haven't defined how you're rendering the EJS file so I'm going to guess that it's correct.
I'd suggest using the .forEach(...) function when looping through an array. See example below.
<% if (locals.userData) { %> <!-- Make sure userData is defined -->
<ul>
<% userData.forEach(user => { %> <!-- Loop through the array -->
<li>
<span><%= user.count %>
</li>
<ul>
<% user.rows.forEach(row => { %> <!-- Loop through the rows -->
<li>
<span><%= row.p_id %>
</li>
<% }); %>
</ul>
<% }); %>
</ul>
<% } %>

forEach loop with if and else statements

So the title might not be the best description of my problem because I don't really know how to sum up the problem. I have a forEach loop for each event in my database and each one is classified as type = to either "trip", "ropes course", or "other". I have a section for each type of event, but I would like a way where if there are no events in the section I can not display the bannertron header and if there are no events in the whole database I can display different HTML. My code also seems very WET and I would love any suggestions on how to DRY up this page.
<% include partials/header %>
<div class="image-text">
<img src="../images/trip-photo.jpg" class="bannertron">
<div class="centered">Upcoming Trips</div>
</div>
<div class="container event">
<% events.forEach(function(event){ %>
<% if(event.type === "trip"){ %>
</br>
<h4><strong><%= event.title %></strong></h4>
<span><%= event.startdate %> - </span>
<span><%= event.enddate %></span>
<h6><strong>Location: </strong><%= event.location %></h6>
<p><%= event.description %></p>
<% if(currentUser && (currentUser.admin === true)){ %>
Edit
<form action="/calendar/<%= event._id %>?_method=DELETE" method="POST">
<button class="btn btn-danger">Delete</button>
</form>
<% } %>
<hr class="event-hr">
<% } %>
<% }); %>
</div>
<div class="image-text">
<img src="../images/climbing-photo.jpg" class="bannertron">
<div class="centered">Upcoming Climbing Days</div>
</div>
<div class="container event">
<% events.forEach(function(event){ %>
<% if(event.type === "ropescourse"){ %>
</br>
<h4><strong><%= event.title %></strong></h4>
<span><%= event.startdate %> - </span>
<span><%= event.enddate %></span>
<h6><strong>Location: </strong><%= event.location %></h6>
<p><%= event.description %></p>
<% if(currentUser && (currentUser.admin === true)){ %>
Edit
<form action="/calendar/<%= event._id %>?_method=DELETE" method="POST">
<button class="btn btn-danger">Delete</button>
</form>
<% } %>
<hr class="event-hr">
<% } %>
<% }); %>
</div>
<div class="image-text">
<img src="../images/other-photo.jpg" class="bannertron">
<div class="centered">Other Events</div>
</div>
<div class="container event">
<% events.forEach(function(event){ %>
<% if(event.type === "other"){ %>
<h4><strong><%= event.title %></strong></h4>
<span><%= event.startdate %> - </span>
<span><%= event.enddate %></span>
<h6><strong>Location: </strong><%= event.location %></h6>
<p><%= event.description %></p>
<% if(currentUser && (currentUser.admin === true)){ %>
Edit
<form action="/calendar/<%= event._id %>?_method=DELETE" method="POST">
<button class="btn btn-danger">Delete</button>
</form>
<% } %>
<hr class="event-hr">
</br>
<% } %>
<% }); %>
</div>
<% include partials/footer %>
Ideally, I would be able to loop through the events, check which type it is, put it in its respective area, and if there are none of a type, display some text like "no events scheduled" and if there are no events in total, display something else.
If this was me, I would split the events up into 3 different arrays in the node file, instead of sorting it all out inside of an ejs file. The Array.prototype.filter command would be useful for this. The nice thing about it is it returns a new array, with only items that return true for the function you pass in. It does not alter the original array, just passes a new one in. You can do something like
var trips = events.filter(function(event){
return event.type == "trip";
});
//do similar for "rope course", and for "other" you could do something like
return event.type != "trip" && event.type != "rope course"
// for the return statement.
You can do a
if(events.length == 0){
// show different html file
} else {
// show the html file with events, passing in the arrays
}
Make sure you pass all the arrays into the ejs file. For each array, you can do a similar
if(trips.length != 0){
// show banner and stuff
}
And do it for all three.
Hope this helps!

ejs for loop randering

I am sending three arrays from my node server to .ejs page and I want to display as like, Image
But I am ending up like,Image
Here is The code,
<div class="webvUI-panel__bd">
<a href="javascript:void(0);" class="webvUI-media-box webvUI-media-box_appmsg">
<% for(var i=0; i < image.length; i++) { %>
<div class="webvUI-media-box__hd">
<img class="webvUI-media-box__thumb" src="<%= image[i]%>" alt="">
</div>
<% } %>
<div class="webvUI-media-box__bd">
<% for(var i=0; i < food.length; i++) { %>
<h4 class="webvUI-media-box__title">
<%= food[i] %>
</h4>
<% } %>
<% for(var i=0; i < price.length; i++) { %>
<p class="webvUI-media-box__desc">
<%= price[i] %>$
</p>
<% } %>
</div>
</a>
</div>
Since every object has the same attributes such as image, food and price. If you define all these attributes within an object, you could group them together as in the below. Instead of sending them seperately, you can model them inside of an object and then you can loop through that object.
<div class="webvUI-panel__bd">
<a href="javascript:void(0);" class="webvUI-media-box webvUI-media-box_appmsg">
<% object.forEach(function(obj)) { %>
<div class="webvUI-media-box__hd">
<img class="webvUI-media-box__thumb" src="<%= obj.image[i]%>" alt="">
<%= obj.food[i] %>
<%= obj.price[i] %>$
</div>
<% } %>
</a>
</div>

How to create a pagination system in Hexo

I love using Hexo.. :)
I've setup custom page. Is it possible to show all post in my page as paginated?
Using site.posts got me all post without pagination.
What should I do to get all post as paginated from page?
Thanks.
In the main configuration file _config.yml, there is a per_page variable to allow you to choose how many post you want ot display per page.
Create a template, index.ejs for example :
<% page.posts.each(function(post) { %>
<article>
// do what you have to do to display each post
</article>
<% }) %>
<%- partial('pagination', {type: 'page'}) %>
As you can see, We use the page variable to get 7 posts.
After that, create an other template pagination.ejs, that allow you to navigate through the page :
<div class="pagination-bar">
<ul class="pagination">
<% if (page.prev) { %>
<li class="pagination-prev">
<% if (page.prev === 1) { %>
<a class="btn btn--default btn--small" href="<%- url_for(' ') %>">
<% } else { %>
<a class="btn btn--default btn--small" href="<%- url_for(page.prev_link) %>">
<% } %>
<i class="fa fa-angle-left text-base icon-mr"></i>
<span><%= __('pagination.newer_posts') %></span>
</a>
</li>
<% } %>
<% if (page.next) { %>
<li class="pagination-next">
<a class="btn btn--default btn--small" href="<%- url_for(page.next_link) %>">
<span><%= __('pagination.older_posts') %></span>
<i class="fa fa-angle-right text-base icon-ml"></i>
</a>
</li>
<% } %>
<li class="pagination-number"><%= _p('pagination.page', page.current) + ' ' + _p('pagination.of', page.total) %></li>
</ul>
</div>
I wrote a Hexo theme : Tranquilpeak, I recommend you to check the source code to understand how I built it and of course read the official Hexo documentation

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