setting up a postgresql database - ruby-on-rails

Question

I am getting the error below when I try creating a database. Here is the database.yml:
default: &default
adapter: postgresql
pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
timeout: 5000
development:
adapter: postgresql
encoding: unicode
database: MyDatabase
host: localhost
pool: 5
username: name
password: name`
# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
<<: *default
database: db/test. postgresql
production:
adapter: postgresql
encoding: unicode
database: MyDatabase_Production
host: localhost
pool: 5
username: name
password: name
role: MyRole
Here is the error:
Database 'MyDatabase' already exists
PG::SyntaxError: ERROR: syntax error at or near "."
LINE 1: CREATE DATABASE "db/test"." postgresql" ENCODING = 'utf8'
^
Couldn't create 'db/test. postgresql' database. Please check your configuration.
rails aborted!
ActiveRecord::StatementInvalid: PG::SyntaxError: ERROR: syntax error at or near "."
LINE 1: CREATE DATABASE "db/test"." postgresql" ENCODING = 'utf8'
^
Caused by:
PG::SyntaxError: ERROR: syntax error at or near "."
LINE 1: CREATE DATABASE "db/test"." postgresql" ENCODING = 'utf8'
^
Tasks: TOP => db:create
(See full trace by running task with --trace)
I am getting the error above when I run rails db:create up my posgresql database

Answer 1

It looks like maybe some of your text config got deleted. Should be something like:
test:
<<: *default
database: test
username: name
password: name

Answer 2

There is a syntax error in database configuration as stated in the error
<<: *default
database: db/test. postgresql
There is a dot and blank space that are not allowed. Renaming it to something else will solve the problem.
Example:
<<: *default
database: db/test_postgresql