Multiple HTTP requests matchable in one VCR cassette for rspec tests - ruby-on-rails

Question

I have a spec file with an expectation that a controller action will return success.
The POST api/v1/users/:id/features/block action in the controller calls two HTTP calls on an external API, the only difference being in the body.
I've put the two requests and responses in the same VCR cassette, but when the cassette is being used, only the first request ever gets compared against and fails when it should be matching the second, causing the tests to fail.
What I'm looking for is a way of having the multiple requests match so the controller action completes and returns successfully.
The error I'm getting is at the end.
describe "POST /api/v1/users/:id/features/block" do
before(:each) do
#user = FactoryGirl.create(:user)
post :block, user_id: #user.id, block: "0"
end
it "should return 200 OK" do
expect(response).to be_success
end
end
Simplified versions of my VCR configuration and RSpec configuration follow:
VCR.configure do |c|
c.hook_into :webmock
c.default_cassette_options = {
match_requests_on: [:method, :uri, :body_regex]
}
c.register_request_matcher :body_regex do |request_1, request_2|
# Match body against regex if cassette body is "--ruby_regex /regexhere/"
if request_2.body[/^--ruby_regex\s*\//]
regex = request_2.body.gsub(/^--ruby_regex\s*\//, '').gsub(/\/$/, '')
request_1.body[/#{regex}/] ? true : false
else
true # No regex defined, continue processing
end
end
end
RSpec.configure do |c|
c.around(:each) do |example|
options = example.metadata[:vcr] || {}
name = example.metadata[:full_description].split(/\s+/, 2).join("/").underscore.gsub(/[^\w\/]+/, "_")
VCR.use_cassette(name, options, &example)
end
end
end
A summarized version of the cassette being used in this comparison that I'm having trouble with is:
---
http_interactions:
- request:
method: post
uri: https://upstream/api
body:
string: --ruby_regex /query1.+block/
response:
status:
code: 200
body:
string: { "response": "SUCCESS" }
- request:
method: post
uri: https://upstream/api
body:
string: --ruby_regex /query2.+block/
response:
status:
code: 200
body:
string: { "response": "SUCCESS" }
recorded_at: Fri, 05 Sep 2014 08:26:12 GMT
recorded_with: VCR 2.8.0
Error during tests:
An HTTP request has been made that VCR does not know how to handle
...
VCR is using the current cassette: (Correct cassette file path)
...
Under the current configuration VCR can not find a suitable HTTP interaction to replay and is prevented from recording new requests.
I don't want to record new requests because then the second one overwrites the first instead of adding the second request to the end of the cassette.