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Multiple select for CSV Export

Sascha M. asked in Rails

Hi there,

My users can create a report record which is basically a scaffolded model "Report" with controller and views. The users can use this model to create records that a CSV method is using to query 2 other models: Order (parent) model and the corresponding Sale (child).

The Report model contains these columns:

t.datetime "start" *(for createdat between (?) and (?))*
t.datetime "end" *(for createdat between (?) and (?))*
t.string   "brand" *(brand = ?)*
t.string   "team" *(team = ?)*

Short excerpt of the CSV query looks like that:

Order.where("created_at between (?) and (?) and brand = ? and team = ?", self.start, self.end, self.brand, self.team).each do |order| order.sales.each do |sale|

This basically outputs each single Sale record in one line. So when 1 Order contains 5 sales, then 5 rows are printed into the CSV file.
That works perfectly with a single brand and a single team.

Now I want to do offer my users multiple select of brands and teams. E.g. when the brand is "Adidas" and "Nike" and the corresponding teams are "US" and "Europe" I want to put both outputs into one CSV instead having the user to create 2 reports.

I'm really struggling with that. What do I need to adjust so that multiple values are getting saved into one record, like brand = "Adidas, Nike" and team = "US, Europe" and then have this array parsed and get that into the CSV AR Query.

Thanks a LOT in advance,
Sascha

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no one? :(

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I haven't done this personally but I have some very similar scenarios and I think that if I were doing it, I'd setup a form that has all the options for your user to select which submits their selections to a custom function that will take that input, run my queries, and generate an array or hash to then pass to the csv save function.

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Perfect. Thank you for the hint. I've resolved it like this:

Form:

<%= f.select :brand, Brand.all.collect {|x| [x.company, x.company]}, {}, :multiple => true, :size => 8 %>

Controller:

params.require(:report).permit(:title, :start, :end, brand: [])

Model (to remove characters):

    before_save do
    self.brand.gsub!(/[\[\]\"]/, "") if attribute_present?("brand")
    self.brand.gsub!(/\A,|,\Z/, '') if attribute_present?("brand")
    self.brand.gsub!(/, /, ',') if attribute_present?("brand")
    self.brand.strip! if attribute_present?("brand")
    end

then

        brands = self.brand
        brands = brands.split(',')

to turn it into an array.

then loop through it, with:

brands.each do |b| ...
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