Displaying 3 results from an estimated 3 matches for "relation_type".
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relocation_type
2006 Jul 20
2
a rails model question
Hi all,
I am a newbie in ruby/rails.
I have a question about my database model:
table1: entities (name, description, author_id ...)
table2: relations (source_id, target_id, relation_type) (it describes
the relations between 2 entities and the relation type)
How can I define models using rails, or do I need to redefine my
database schema?
thank you
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Posted via http://www.ruby-forum.com/.
2008 May 27
2
HABTM using two columns
Hi all,
I was wondering whether anyone could guide me to docu and code
examples how to create and use a has_and_belongs_to_many relationship
with a joining table where TWO columns are used to identify the
relation to TWO alternative tables.
Example:
table 1: mothers [mother_id, name]
table 2: fathers [father_id, name]
table 3: children [child_id, name]
joining table 4: children_parent
2011 Jan 19
6
rake aborted! can't convert Hash into String
Hello,
I encouter a problem when i try to do "rake db:migrate":
rake aborted!
can''t convert Hash into String
Here is the trace result:
** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
rake aborted!
can''t convert Hash into String
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/fileutils.rb:1408:in