I am using rails 5 when user is registered in my website i am sending an email for him for account approval.I want to set website logo with email.
How we implement this in rails mailer view file
Html for mail template
<!DOCTYPE HTML>
<html>
<title>nytApp Email</title>
<head>
</head>
<body style="font-family: 'arial', sans-serif !important; font-size: 14px; line-height: 20px; color:#3e3e3e; background-color: #f5f5f5; font-weight: 300;">
<!-- Container Table -->
<table cellpadding="0" cellspacing="0" border="0" width="100%">
<tr>
<td>
<table cellpadding="0" cellspacing="0" width="640" style="margin:0 auto; background:#fff;">
<tr>
<td style="border: 1px solid #f5cd8f;">
<table cellpadding="0" cellspacing="0" border="0" width="100%">
<tr>
<td style="padding: 25px 15px 20px; border-bottom: 1px solid #f5cd8f;">
<table align="center" cellpadding="0" cellspacing="0" border="0" width="100%">
<tr>
<td><%= image_path('logo.png')%></td>
<td>
<table cellpadding="0" cellspacing="0" border="0" width="100%" style="font-weight: bold; font-size: 16px;">
<tr>
<td style="color: #ff5e00; font-weight: 300; font-size: 20px;">Welcome to Nytapp</td>
</tr>
</table>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td style="padding: 0 15px 20px;">
<table align="center" cellpadding="0" cellspacing="0" border="0" width="100%">
<tr><td height="10"></td></tr>
<tr>
<td>Thank you for signing up as Events Promoter!</td>
</tr>
<tr><td height="25"></td></tr>
<tr>
<td>You are ready to start posting your parties for free. Login to the portal by clicking on the link below:</td>
</tr>
<tr><td height="10"></td></tr>
<tr>
<td><a href="https://night-app.herokuapp.com/admin" style="color: #00a8ff;">https://nytapp.com</a></td>
</tr>
<tr><td height="10"></td></tr>
<tr>
<td>If the above URL does not work try copying and pasting it into your browser.</td>
</tr>
<tr><td height="8"></td></tr>
<tr>
<td>If you encounter any problem, please contact us at <a href="mailto:[email protected]" style="color: #333; font-weight: bold; text-decoration: none;">[email protected]</a></td>
</tr>
<tr><td height="25"></td></tr>
<tr>
<td>Thank you,</td>
</tr>
<tr>
<td>The Nytapp team</td>
</tr>
<tr><td height="30"></td></tr>
</table>
</td>
</tr>
<tr>
<td style="border-top: 1px solid #f5cd8f; vertical-align: middle; padding: 10px 15px;">
<table cellpadding="0" cellspacing="0" border="0" width="100%">
<tr>
<td>
<%= image_path('logo.png') %>
</td>
</tr>
</table>
</td>
</tr>
</table>
</td>
</tr>
</table>
</td>
</tr>
</table>
</body>
</html>
In mailer you can't give relative path. So try upload your logo somewhere in cloud like s3 and give complete logo url in image tag source.
You can also use
asset_urlit compute complete url.