Class: RelaxDB::ViewUploader

Inherits:
Object
  • Object
show all
Defined in:
lib/relaxdb/view_uploader.rb

Class Method Summary collapse

Class Method Details

.extract(lines) ⇒ Object 



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# File 'lib/relaxdb/view_uploader.rb', line 30

def extract(lines)
  # Index of function declaration matches
  m = []

  0.upto(lines.size-1) do |p|
    line = lines[p]
    m << p if line =~ /^function[^\{]+\{/
  end
  # Add one beyond the last line number as the final terminator
  m << lines.size

  0.upto(m.size-2) do |i|
    declr = lines[m[i]]
    declr =~ /(\w)+-(\w)+/
    declr.sub!($&, '')
    view_name, type = $&.split('-')
    func = lines[m[i]...m[i+1]]
    
    # Cater for erlang view shortcuts e.g. _sum, _count etc.
    if func[1] =~ /\s*_\w+\s*$/
      func = func[1].strip
    else
      func = func.join
    end
    
    yield view_name, type, func
  end
end

.upload(filename) ⇒ Object

Methods must start and finish on different lines The function declaration must start at the beginning of a line As ‘-’ is used as a delimiter, the view name may not contain ‘-’ Expected function declaration form is 

function funcname-functype(doc) {

For example 

function Users_followers-map(doc) {

Builtin Erlang views may be specified by listing a one-line function that contains only the builtin name. For example:

function Users_followers-reduce() {
  _sum
}



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# File 'lib/relaxdb/view_uploader.rb', line 21

def upload(filename)
  lines = File.readlines(filename)
  dd = RelaxDB::DesignDocument.get(RelaxDB.dd)
  extract(lines) do |vn, t, f|
    dd.add_view(vn, t, f)
  end
  dd.save
end