Class: Arel::Collectors::Sunstone

Inherits:
Bind
  • Object
show all
Defined in:
lib/arel/collectors/sunstone.rb

Constant Summary collapse

MAX_URI_LENGTH = 
2083

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Sunstone

Returns a new instance of Sunstone.



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# File 'lib/arel/collectors/sunstone.rb', line 14

def initialize
  @join_source = []
  @binds = []
end

Instance Attribute Details

#binds ⇒ Object (readonly)

Returns the value of attribute binds.



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# File 'lib/arel/collectors/sunstone.rb', line 12

def binds
  @binds
end

#columns ⇒ Object

Returns the value of attribute columns.



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# File 'lib/arel/collectors/sunstone.rb', line 7

def columns
  @columns
end

#distinct ⇒ Object

Returns the value of attribute distinct.



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# File 'lib/arel/collectors/sunstone.rb', line 7

def distinct
  @distinct
end

#distinct_on ⇒ Object

Returns the value of attribute distinct_on.



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# File 'lib/arel/collectors/sunstone.rb', line 7

def distinct_on
  @distinct_on
end

#eager_loads ⇒ Object

Returns the value of attribute eager_loads.



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# File 'lib/arel/collectors/sunstone.rb', line 7

def eager_loads
  @eager_loads
end

#id ⇒ Object

Returns the value of attribute id.



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# File 'lib/arel/collectors/sunstone.rb', line 7

def id
  @id
end

#join_source ⇒ Object

This is used to removed an bind values. It is not used in the request



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# File 'lib/arel/collectors/sunstone.rb', line 10

def join_source
  @join_source
end

#limit ⇒ Object

Returns the value of attribute limit.



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# File 'lib/arel/collectors/sunstone.rb', line 7

def limit
  @limit
end

#offset ⇒ Object

Returns the value of attribute offset.



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# File 'lib/arel/collectors/sunstone.rb', line 7

def offset
  @offset
end

#operation ⇒ Object

Returns the value of attribute operation.



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# File 'lib/arel/collectors/sunstone.rb', line 7

def operation
  @operation
end

#order ⇒ Object

Returns the value of attribute order.



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# File 'lib/arel/collectors/sunstone.rb', line 7

def order
  @order
end

#request_type ⇒ Object

Returns the value of attribute request_type.



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# File 'lib/arel/collectors/sunstone.rb', line 7

def request_type
  @request_type
end

#table ⇒ Object

Returns the value of attribute table.



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# File 'lib/arel/collectors/sunstone.rb', line 7

def table
  @table
end

#updates ⇒ Object

Returns the value of attribute updates.



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# File 'lib/arel/collectors/sunstone.rb', line 7

def updates
  @updates
end

#where ⇒ Object

Returns the value of attribute where.



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# File 'lib/arel/collectors/sunstone.rb', line 7

def where
  @where
end

Instance Method Details

#add_bind(bind) ⇒ Object 



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# File 'lib/arel/collectors/sunstone.rb', line 19

def add_bind(bind)
  @binds << bind.value_for_database
  bind
end

#compile(bvs, conn = nil) ⇒ Object 



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# File 'lib/arel/collectors/sunstone.rb', line 94

def compile bvs, conn = nil
  path = "/#{table}"
  headers = {}
  request_type_override = nil

  body = nil
  if updates
    body = {
      table.singularize => substitute_binds(updates.clone, bvs)
    }
  end

  if !join_source.empty?
    substitute_binds(join_source.clone, bvs)
  end

  params = {}
  params[:where] = substitute_binds(where.clone, bvs) if where

  if eager_loads
    params[:include] = eager_loads.clone
  end

  if distinct_on
    params[:distinct_on] = distinct_on
  elsif distinct
    params[:distinct] = true 
  end

  if limit.is_a?(Arel::Nodes::BindParam)
    params[:limit] = substitute_binds(limit, bvs)
  elsif limit
    params[:limit] = limit
  end

  params[:order] = substitute_binds(order, bvs) if order

  if offset.is_a?(Arel::Nodes::BindParam)
    params[:offset] = substitute_binds(offset, bvs)
  elsif offset
    params[:offset] = offset
  end
  
  case operation
  when :count
    path += "/#{operation}"
  when :calculate
    path += "/calculate"
    params[:select] = columns
  when :update, :delete
    path += "/#{params[:where]['id']}"
    params.delete(:where)
  end

  if params.size > 0 && request_type == Net::HTTP::Get
    newpath = path + "?#{CGI.escape(MessagePack.pack(params))}"
    if newpath.length > MAX_URI_LENGTH
      request_type_override = Net::HTTP::Post
      headers['X-Http-Method-Override'] = 'GET'
      if body
        body.merge!(params)
      else
        body = params
      end
    else
      path = newpath
      headers['Query-Encoding'] = 'application/msgpack'
    end
  end

  request = (request_type_override || request_type).new(path)
  headers.each { |k,v| request[k] = v }
  request.instance_variable_set(:@sunstone_calculation, true) if [:calculate, :delete].include?(operation)

  if body
    request.body = body.to_json
  end

  request
end

#flatten_nested(obj) ⇒ Object 



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# File 'lib/arel/collectors/sunstone.rb', line 77

def flatten_nested(obj)
  if obj.is_a?(Array)
    obj.map { |w| flatten_nested(w) }
  elsif obj.is_a?(Hash)
    obj.map{ |k,v| [k, flatten_nested(v)] }.flatten
  else
    obj
  end
end

#sql_for(bvs, conn = nil) ⇒ Object 



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# File 'lib/arel/collectors/sunstone.rb', line 91

def sql_for(bvs, conn = nil)
  compile(bvs, conn)
end

#substitute_binds(hash, bvs) ⇒ Object 



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# File 'lib/arel/collectors/sunstone.rb', line 24

def substitute_binds hash, bvs
  if hash.is_a?(Array)
    hash.map do |v|
      if v.is_a?(ActiveRecord::Relation::QueryAttribute)
        new_v = bvs.shift
        if new_v.is_a?(ActiveRecord::Relation::QueryAttribute)
          new_v.value_for_database
        else
          v.type.serialize(new_v)
        end
      elsif v.is_a?(Arel::Nodes::BindParam)
        bvs.shift#.value_for_database
      elsif v.is_a?(Hash) || v.is_a?(Array)
        substitute_binds(v, bvs)
      else
        v
      end
    end
  elsif hash.is_a?(Hash)
    newhash = {}
    hash.each do |k, v|
      if v.is_a?(ActiveRecord::Relation::QueryAttribute)
        new_v = bvs.shift
        newhash[k] = if new_v.is_a?(ActiveRecord::Relation::QueryAttribute)
          new_v.value_for_database
        else
          v.type.serialize(new_v)
        end
      elsif v.is_a?(Arel::Nodes::BindParam)
        newhash[k] = bvs.shift || v.value.value_for_database
      elsif v.is_a?(Hash)
        newhash[k] = substitute_binds(v, bvs)
      elsif v.is_a?(Array)
        newhash[k] = substitute_binds(v, bvs)
      else
        newhash[k] = v
      end
    end
    newhash
  elsif hash.is_a?(Arel::Nodes::BindParam)
    bvs.shift
  elsif hash.is_a?(ActiveRecord::Relation::QueryAttribute)
    new_v = bvs.shift
    if new_v.is_a?(ActiveRecord::Relation::QueryAttribute)
      new_v.value_for_database
    else
      v.type.serialize(new_v)
    end
  else
    bvs.shift
  end
end

#value ⇒ Object 



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# File 'lib/arel/collectors/sunstone.rb', line 87

def value
  self
end