未初始化的常量Mysql

Question

I'm working on a web service to access my database via mysql, but I keep getting this error : NameError - uninitialized constant Mysql

When I created the Database, i did not add a password to it. I am using Microsoft SQL Management Studio. To test the web service i am using Advanced REST client.

This is my code

get '/all_users/' do
conn=Mysql.new('localhost','My-PC\Nikki','', 'My-PC\Project')
recordsArray = "{\"clientList\":["
clientArray = Array.new
sql = 'select * from ServerUsers'
records = conn.do(sql) do |record|
    client = AndroidtableClientsSearch.new(record[0],record[1],record[2],record[3], record[4])
    clientArray<<client.to_s
end
conn.logoff
recordsArray<<clientArray.join(',')
recordsArray<<"]}"
recordsArray
end

Answer 1

I got the same error. You also need to install the mysql gem. Running 'gem install mysql' fixed this for me.