I get a "can't convert String into Integer (TypeError)" error about the
print statement in the following code. The sqlite3-ruby library has been
installed successfully on my OS X 10.5 system. The code executes fine if
I replace the print statement with: print "hello". Any suggestions? All
I want to do is iterate through each row in the return set (rows) of the
executed query and look at specific column values. I have run out of
ideas on how to fix this and would appreciate any help. Thanks...
#!/usr/bin/ruby
require "sqlite3"
query = "select * from moz_bookmarks"
db = SQLite3::Database.new("/Users/me/Desktop/places.sqlite")
rows = db.execute(query)
rows.each do |row|
print row['title']
end
···
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Posted via http://www.ruby-forum.com/.
I get a "can't convert String into Integer (TypeError)" error about the
print statement in the following code. The sqlite3-ruby library has been
installed successfully on my OS X 10.5 system. The code executes fine if
I replace the print statement with: print "hello". Any suggestions? All
I want to do is iterate through each row in the return set (rows) of the
executed query and look at specific column values. I have run out of
ideas on how to fix this and would appreciate any help. Thanks...
#!/usr/bin/ruby
require "sqlite3"
query = "select * from moz_bookmarks"
db = SQLite3::Database.new("/Users/me/Desktop/places.sqlite")
rows = db.execute(query)
# Rows is an array of arrays....
rows.each do |row|
# At this point, "row" is a straightforward array - you need to use
Integer indices
print row['title']
# This fails because you cannot use a string as an integer into an array. Try
puts row[0]
···
2008/6/20 The Doobs <thedoobs@gmail.com>:
end
--
Posted via http://www.ruby-forum.com/\.
--
JJ
Perhaps it would help if you uploaded places.sqlite somewhere (like
Mediafire) so we can try the program. Otherwise, even the schema would
help
Les
···
On 6/20/08, The Doobs <thedoobs@gmail.com> wrote:
I get a "can't convert String into Integer (TypeError)" error about the
print statement in the following code. The sqlite3-ruby library has been
installed successfully on my OS X 10.5 system. The code executes fine if
I replace the print statement with: print "hello". Any suggestions? All
I want to do is iterate through each row in the return set (rows) of the
executed query and look at specific column values. I have run out of
ideas on how to fix this and would appreciate any help. Thanks...
#!/usr/bin/ruby
require "sqlite3"
query = "select * from moz_bookmarks"
db = SQLite3::Database.new("/Users/me/Desktop/places.sqlite")
rows = db.execute(query)
rows.each do |row|
print row['title']
end
Nevermind, it's easy to create such a database.
Les
···
On 6/21/08, Leslie Viljoen <leslieviljoen@gmail.com> wrote:
On 6/20/08, The Doobs <thedoobs@gmail.com> wrote:
> I get a "can't convert String into Integer (TypeError)" error about the
> print statement in the following code. The sqlite3-ruby library has been
> installed successfully on my OS X 10.5 system. The code executes fine if
> I replace the print statement with: print "hello". Any suggestions? All
> I want to do is iterate through each row in the return set (rows) of the
> executed query and look at specific column values. I have run out of
> ideas on how to fix this and would appreciate any help. Thanks...
>
> #!/usr/bin/ruby
>
> require "sqlite3"
>
> query = "select * from moz_bookmarks"
> db = SQLite3::Database.new("/Users/me/Desktop/places.sqlite")
> rows = db.execute(query)
> rows.each do |row|
> print row['title']
> end
Perhaps it would help if you uploaded places.sqlite somewhere (like
Mediafire) so we can try the program. Otherwise, even the schema would
help
This program gives what you want:
#!/usr/bin/ruby
require "sqlite3"
query = "select * from moz_bookmarks"
db = SQLite3::Database.new("test.sqlite")
db.results_as_hash = true
rows = db.execute(query)
rows.each do |row|
#p row
#puts row.class
#p row.methods
puts row['title']
end
The commented bits will help you with debugging in the future. They enable
you to see what kind of objects you are dealing with.
The answer to selecting rows by column name is to use
db.results_as_hash as above. This was easily discovered via google.
Go here: http://sqlite-ruby.rubyforge.org/
Click on the 'FAQ' link.
Les
You're welcome.
@leslie - cool, I didn't know about the results_as_hash, very handy.
···
--
JJ