Did you find a solution ? even I am facing the same problem
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Could you please post a sample plugin crashing?
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The file index.api.rsb is in \redmine-2.3.1\plugins\smiles\app\views\timelog
<pre>
api.array :time_entries, api_meta(:total_count => @entry_count, :offset => @offset, :limit => @limit) do
@entries.each do |time_entry|
api.time_entry do

spent_on = time_entry.spent_on.present? ? time_entry.spent_on.strftime('%d-%m-%Y') : ''
created_on = time_entry.created_on.present? ? time_entry.created_on.strftime('%d-%m-%Y') : ''
updated_on = time_entry.updated_on.present? ? time_entry.updated_on.strftime('%d-%m-%Y') : ''

api.id time_entry.id
pi.project(:id => time_entry.project_id, :name => time_entry.project.name) unless time_entry.project.nil?
api.issue(:id => time_entry.issue_id) unless time_entry.issue.nil?
api.employee(:id => time_entry.user.employee_id) unless time_entry.user.nil?
api.user(:id => time_entry.user_id, :name => time_entry.user.name) unless time_entry.user.nil?
api.activity(:id => time_entry.activity_id, :name => time_entry.activity.name) unless time_entry.activity.nil?
api.hours time_entry.hours
api.comments time_entry.comments
api.spent_on spent_on
api.created_on created_on
api.updated_on updated_on
render_api_custom_values time_entry.custom_field_values, api
end
end
end
</pre>
the error log is
<pre>
Rendered plugins/smiles/app/views/timelog/index.api.rsb within layouts/base (0.0ms)
Completed 500 Internal Server Error in 815ms

ActionView::Template::Error (No builder for format ):
1: api.array :time_entries, api_meta(:total_count => @entry_count, :offset => @offset, :limit => @limit) do
2: @entries.each do |time_entry|
3: api.time_entry do
4:
lib/redmine/views/builders.rb:28:in `for'
app/controllers/timelog_controller.rb:64:in `block (2 levels) in index'
app/controllers/timelog_controller.rb:51:in `index'
</pre>
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Any update on this?
In my plugin I am overriding both issues/index.api.rsb and issues/show.api.rsb. Its working fine for show.api.rsb but is giving error for index.api.rsb.
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After trying out few things I eventually figured out a solution for this. If you are overriding api responses i.e views/issues/index.api.rsb in a plugin, you need to override the html view of that action in the plugin as well. So you just need to copy views/issues/index.html.erb to your plugin views.

_cp app/views/issues/index.html.erb plugins/myplugin/app/views/index.html.erb_
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Kumar Akarsh wrote:
> After trying out few things I eventually figured out a solution for this. If you are overriding api responses i.e views/issues/index.api.rsb in a plugin, you need to override the html view of that action in the plugin as well. So you just need to copy views/issues/index.html.erb to your plugin views.
>
> _cp app/views/issues/index.html.erb plugins/myplugin/app/views/index.html.erb_

that does work, thanks

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Copy/Pasting views/issues/index.html.erb to the plugin views do fix the error, but we should be able to override the API without modifying the HTML view. Any way to fix the original bug?
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with redmine 3 you also have to copy/paste views/issues/index.pdf.erb and views/issues/show.pdf.erb :(
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Fixed in r14375.
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Hi! It would be nice if this patch was backported to the 2.6.x branch.
Thank you!
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For *redmine 2.6*, i fixed it by changing one line in *redmine_root/config/initializers/10-patches.rb*

*Change this block of code*

<pre>
class Resolver
def find_all(name, prefix=nil, partial=false, details={}, key=nil, locals=[])
cached(key, [name, prefix, partial], details, locals) do
if details[:formats] & [:xml, :json]
details = details.dup
details[:formats] = details[:formats].dup + [:api]
end
find_templates(name, prefix, partial, details)
end
end
end
</pre>

*TO*
<pre>
class Resolver
def find_all(name, prefix=nil, partial=false, details={}, key=nil, locals=[])
cached(key, [name, prefix, partial], details, locals) do
if (details[:formats] & [:xml, :json]).any?
details = details.dup
details[:formats] = details[:formats].dup + [:api]
end
find_templates(name, prefix, partial, details)
end
end
end
</pre>
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