How to append an element to an array using update command in rails?

Question

Here's my code

project.reports << report
project.save

I want to write a single update command instead of these two lines. Something like

project.update(reports << report)

Is there any possible way to do this?

Was there something like project.create(report) with has_many :reports mapping? — Smar
– Smar, Commented Jan 12, 2016 at 17:41
project.reports << report should save both objects I believe — Mike Szyndel
– Mike Szyndel, Commented Jan 12, 2016 at 17:45
@Smar, Mapping already there in model. However, I am implementing this as a part of services. — Aman Gupta
– Aman Gupta, Commented Jan 12, 2016 at 18:02
Okay in this case @MichalSzyndel is correct... AmanGupta: I guess it worked correctly even first; the API may be a bit unintuitive here. — Smar
– Smar, Commented Jan 12, 2016 at 18:09

rohan · Accepted Answer · 2016-01-12 18:18:45Z

0

If you have association like Project has many Reports, then simply using

project.reports << report

will call save too. No need to call project.save seperately.

answered Jan 12, 2016 at 18:18

rohan

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3 Comments

This seems to be a correct answer, but I never saw such thing in rails guide. Can you give me some online reference related to this?

see stackoverflow.com/questions/11043096/… . I also verified it on a local project, it works.

Yeah, that's perfect!