Hi All - I was so excited I was able to create this very "simple" trigger (so new to this) and when I went to deploy it to Prod I received a 0% Code Coverage error. Could someone please help me understand this code coverage madness and what I actually need to do? Is it an Apex Class? I'm so lost...any help is much appreciated, my trigger below for reference.

trigger AttachmentCount on Attachment (after insert)
{

List<lead> co = [select id, Attachment_Added__c from lead where id =:
Trigger.New[0].ParentId];
if(co.size()>0)
{
co[0].Attachment_Added__c = True;
update co;
}
}

I need to create a table like the one below & place it on our lead page layout.
 

JAN

FEB

MAR

APR

MAY

JUN

JUL

AUG

SEP

OCT

NOV

DEC

Usage

Cost

I thought perhaps a visualforce page would be the answer so I created a 'usage' and 'cost' fields for each month like the ones below:
Jan_u__c
Jan_c__c
Feb_u__c
Feb_c__c

But I don't know how to set it up as a vf page. If anyone has any feedback or sample code that can get me started that would be much appreciated.
 

Hi All - I was so excited I was able to create this very "simple" trigger (so new to this) and when I went to deploy it to Prod I received a 0% Code Coverage error. Could someone please help me understand this code coverage madness and what I actually need to do? Is it an Apex Class? I'm so lost...any help is much appreciated, my trigger below for reference.

trigger AttachmentCount on Attachment (after insert)
{

List<lead> co = [select id, Attachment_Added__c from lead where id =:
Trigger.New[0].ParentId];
if(co.size()>0)
{
co[0].Attachment_Added__c = True;
update co;
}
}

I need to create a table like the one below & place it on our lead page layout.
 

JAN

FEB

MAR

APR

MAY

JUN

JUL

AUG

SEP

OCT

NOV

DEC

Usage

Cost

I thought perhaps a visualforce page would be the answer so I created a 'usage' and 'cost' fields for each month like the ones below:
Jan_u__c
Jan_c__c
Feb_u__c
Feb_c__c

But I don't know how to set it up as a vf page. If anyone has any feedback or sample code that can get me started that would be much appreciated.