Hi,
Just yesterday I successfully installed ruby in my pc, means I am
new in this technology.
Today I am trying to fetch the data in my ruby application and
successfully done this. Now I want to speed up the performance of the
fetching data by making use of prepare and execute method.In case of
select query also I am using this like
require ''mysql''
mysql = Mysql.init()
mysql.connect(''localhost'',''root'','''',''ruby'')
selection = mysql.prepare("select * from test where id=?")
result = selection.execute(2)
while row = result.fetch_hash do
puts "The name is: #{row[''name'']}"
end
mysql.close();
So when I run this small part of the application I am getting the
following error:
in `<top (required)>'': undefined method
`fetch_hash'' for
#<Mysql::Stmt:0xf9d128> (NoMethodError)
from -e:1:in `load''
from -e:1:in `<main>''
But if we write code like:
require ''mysql''
mysql = Mysql.init()
mysql.connect(''localhost'',''root'','''',''ruby'')
result = mysql.query("select * from test where id=2")
while row = result.fetch_hash do
puts "The name is: #{row[''name'']}"
end
mysql.close();
then my application is running without error.
Now my question is, if we try to fetch the data by making use of prepare
and execute method then what will be the available methods for showing
the records?
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Srimanta Chakraborty wrote in post #1043667:> Hi, > Just yesterday I successfully installed ruby in my pc, means I am > new in this technology. > Today I am trying to fetch the data in my ruby application and > successfully done this. Now I want to speed up the performance of the > fetching data by making use of prepare and execute method.In case of > select query also I am using this like > > require ''mysql'' > mysql = Mysql.init() > mysql.connect(''localhost'',''root'','''',''ruby'') > selection = mysql.prepare("select * from test where id=?") > result = selection.execute(2) > while row = result.fetch_hash do > puts "The name is: #{row[''name'']}" > end > mysql.close(); > > So when I run this small part of the application I am getting the > following error: > in `<top (required)>'': undefined method `fetch_hash'' for > #<Mysql::Stmt:0xf9d128> (NoMethodError) > from -e:1:in `load'' > from -e:1:in `<main>'' > > But if we write code like: > require ''mysql'' > mysql = Mysql.init() > mysql.connect(''localhost'',''root'','''',''ruby'') > result = mysql.query("select * from test where id=2") > while row = result.fetch_hash do > puts "The name is: #{row[''name'']}" > end > mysql.close(); > > then my application is running without error. > > Now my question is, if we try to fetch the data by making use of prepare > and execute method then what will be the available methods for showing > the records?If I use the first option and use fetch method instead of fetch_hash method then I am getting the records but by using only index, the array is fetching not by column name. So how to get that? -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
On 2 February 2012 10:42, Srimanta Chakraborty <lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org> wrote:> Hi, > Just yesterday I successfully installed ruby in my pc, means I am > new in this technology. > Today I am trying to fetch the data in my ruby application and > successfully done this. Now I want to speed up the performance of the > fetching data by making use of prepare and execute method.In case of > select query also I am using this like > > require ''mysql'' > mysql = Mysql.init() > mysql.connect(''localhost'',''root'','''',''ruby'') > selection = mysql.prepare("select * from test where id=?") > result = selection.execute(2) > while row = result.fetch_hash do > puts "The name is: #{row[''name'']}" > end > mysql.close(); > > So when I run this small part of the application I am getting the > following error: > in `<top (required)>'': undefined method `fetch_hash'' for > #<Mysql::Stmt:0xf9d128> (NoMethodError) > from -e:1:in `load'' > from -e:1:in `<main>'' > > But if we write code like: > require ''mysql'' > mysql = Mysql.init() > mysql.connect(''localhost'',''root'','''',''ruby'') > result = mysql.query("select * from test where id=2") > while row = result.fetch_hash do > puts "The name is: #{row[''name'']}" > end > mysql.close(); > > then my application is running without error. > > Now my question is, if we try to fetch the data by making use of prepare > and execute method then what will be the available methods for showing > the records?I don''t know the answer to your question, but I see you are not using Rails, just Ruby. Are you intending to use Rails or is this to be a native Ruby application? This is principally an RoR list, someone here may well know the answer but there may be better places to ask for straight Ruby questions. Colin -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
Colin Law wrote in post #1043686:> On 2 February 2012 10:42, Srimanta Chakraborty <lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org> > wrote: >> mysql.connect(''localhost'',''root'','''',''ruby'') >> #<Mysql::Stmt:0xf9d128> (NoMethodError) >> end >> mysql.close(); >> >> then my application is running without error. >> >> Now my question is, if we try to fetch the data by making use of prepare >> and execute method then what will be the available methods for showing >> the records? > > I don''t know the answer to your question, but I see you are not using > Rails, just Ruby. Are you intending to use Rails or is this to be a > native Ruby application? This is principally an RoR list, someone > here may well know the answer but there may be better places to ask > for straight Ruby questions. > > ColinSorry for choose this forum as a "Ruby on Rails". Anyway, I am posting this as "Ruby" again. -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.