Ruby on Rails

On 26 March 2013 09:33, Myth17 <nitishupreti@gmail.com> wrote:
> Grade is anything like 4,5 or say HighSchool with a 'name' and 'description'
> attribute.

Please don't top post, it makes it difficult to follow the thread. Thanks.

So a curriculum has many grades and a grade has many curriculums.
A topic is associated with a set of grade/curriculum combinations.

I think the solution is a join table (you will have to think of a good
name for it), I will say c_g_ts to save typing here. So:
Curriculum has_many c_g_ts and has_many topics through c_g_t and
has_many grades through c_g_t
Grade has_many c_g_ts and has_many curriculums through c_g_t and
has_many topics through c_g_t
Topic has_many ...

CGT belongs_to Curriculum and Grade and Topic.

Does that sound as if it will do the job?

Colin


>
> On Tuesday, March 26, 2013 2:45:16 PM UTC+5:30, Colin Law wrote:
>>
>> On 26 March 2013 08:29, Myth17 <nitish...@gmail.com> wrote:
>> > I have three models in Rails as : Curriculum, Grade and Topics.
>> >
>> > The relationship scenario is like :
>> >
>> > Curriculum 'International Baccalaureate(IB)' in grade '6' has_many
>> > Topics (
>> > t1,t2,t3 and CompareFraction)
>> >
>> > Curriculum 'CBSE' in grade '5' has_many Topics (t1,t2,t4,t5 and
>> > CompareFraction) [ A Topic 'Compare Fraction' will be taught in many
>> > different curriculums but maybe in different grades ]
>> >
>> > A Grade, say 5 will itself be a part of all Curriculums like IB,CBSE.
>> >
>> > I need to store information such that for a Topic Compare Fraction, I
>> > can
>> > say:
>> >
>> > It is taught in IB in grade 5
>> >
>> > It is taught in CBSE in grade 4.
>> >
>> > How can I set this up in Rails?
>>
>> You have not given us enough information.
>>
>> I have no idea what a Grade object is. What are the fields of a grade
>> object?
>>
>> Colin

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