YAML syntax error when running "heroku run rake db:migrate" on my Rails app

Question

I've searched every solve for this problem for hours but I just can't get it to work.

I have a Rails app and I'm trying to deploy it to heroku, but when I run heroku run rake db:migrate, I get this error:

rake aborted!
YAML syntax error occurred while parsing /app/config/database.yml. Please note that YAML must be consistently indented using spaces. Tabs are not allowed. Error: (<unknown>): did not find expected key while parsing a block mapping at line 7 column 3

I already used a YAML validator to validate my database.yml, but it still does not work. Here is how it looks like:

# database.yml
--- 
default: 
  adapter: postgresql
  encoding: unicode
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
development: 
  adapter: postgresql
  database: chamada_development
  encoding: unicode
  password: "<%= ENV['CHAMADA_DATABASE_PASSWORD'] %>"
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
  username: chamada
production: 
  adapter: postgresql
  database: chamada_production
  encoding: unicode
  password: "<%= ENV['CHAMADA_DATABASE_PASSWORD'] %>"
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
  username: chamada
test: 
  adapter: postgresql
  database: chamada_test
  encoding: unicode
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>

How can I solve this? I have no clue.

Answer 1

I just solved it starting over the step by step to deploy the App in Heroku.