How to insert hash values into database?

Question

I have a hash like so:

{
 "feid"=>32, 
 "fid"=>11, 
 "fipl"=>11, 
}

I want to save each value to it's respective column in a database.

I know I can do the following

    record = Metric.new
    record.feid = hash['feid']
    record.fid  = hash['fid']
    record.fipl = hash['fipl']
    record.save

But my hash is a lot longer than 3 elements and there must be much more simple way!

Do record.update_attributes(hash)... if record already exists, — Arup Rakshit
– Arup Rakshit, Commented Mar 4, 2014 at 10:48

BroiSatse · Accepted Answer · 2014-03-04 11:05:14Z

4

There is. For new record (creation, assignment and saving to db in one go):

record = Metric.create(hash)

Creation and assignment without saving:

record = Metric.new(hash)

For existing record, assigning and saving:

record.update_attributes(hash)

and assignnment without saving:

record.assign_attributes(hash)

Note:

Saving methods (create and update) will not raise an exception if saving fails (e.g because of failing validation). Saving fails quietly. If you want to get an exception when this happens, use banged versions: create! and update_attributes!

edited Mar 4, 2014 at 11:05

answered Mar 4, 2014 at 10:48

BroiSatse

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2 Comments

Max Rose-Collins Over a year ago

Thanks a lot, I tried record = Metric.new(hash) but I wondered why it wasn't inserting into the db. I understand why now :p

Max Williams Over a year ago

Just as a little extra comment, as well as obj.assign_attributes(hash) you can do obj.attributes = hash: the two are equivalent but the latter may be syntactically preferable in some contexts.

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