Class: Gcloud::Bigquery::Data

Inherits:
Array
  • Object
show all
Defined in:
lib/gcloud/bigquery/data.rb

Overview

# Data

Represents Table Data as a list of name/value pairs. Also contains metadata such as ‘etag` and `total`.

Direct Known Subclasses

QueryData

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(arr = []) ⇒ Data

Returns a new instance of Data.



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# File 'lib/gcloud/bigquery/data.rb', line 35

def initialize arr = []
  @table = nil
  @gapi = {}
  super arr
end

Instance Attribute Details

#gapi ⇒ Object 



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# File 'lib/gcloud/bigquery/data.rb', line 32

def gapi
  @gapi
end

#table ⇒ Object 



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# File 'lib/gcloud/bigquery/data.rb', line 28

def table
  @table
end

Class Method Details

.format_rows(rows, fields) ⇒ Object

rubocop:disable all Disabled rubocop because this implementation will not last.



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# File 'lib/gcloud/bigquery/data.rb', line 96

def self.format_rows rows, fields
  headers = Array(fields).map { |f| f["name"] }
  field_types = Array(fields).map { |f| f["type"] }

  Array(rows).map do |row|
    values = row["f"].map { |f| f["v"] }
    formatted_values = format_values field_types, values
    Hash[headers.zip formatted_values]
  end
end

.format_values(field_types, values) ⇒ Object 



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# File 'lib/gcloud/bigquery/data.rb', line 107

def self.format_values field_types, values
  field_types.zip(values).map do |type, value|
    begin
      if value.nil?
        nil
      elsif type == "INTEGER"
        Integer value
      elsif type == "FLOAT"
        Float value
      elsif type == "BOOLEAN"
        (value == "true" ? true : (value == "false" ? false : nil))
      else
        value
      end
    rescue
      value
    end
  end
end

.from_response(resp, table) ⇒ Object 



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# File 'lib/gcloud/bigquery/data.rb', line 84

def self.from_response resp, table
  formatted_rows = format_rows resp.data["rows"], table.fields

  data = new formatted_rows
  data.table = table
  data.gapi = resp.data
  data
end

Instance Method Details

#etag ⇒ Object

A hash of this page of results.



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# File 'lib/gcloud/bigquery/data.rb', line 54

def etag
  @gapi["etag"]
end

#kind ⇒ Object

The resource type of the API response.



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# File 'lib/gcloud/bigquery/data.rb', line 43

def kind
  @gapi["kind"]
end

#next ⇒ Object 



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# File 'lib/gcloud/bigquery/data.rb', line 69

def next
  return nil unless next?
  ensure_table!
  table.data token: token
end

#next? ⇒ Boolean

Is there a next page of data?

Returns:

  • (Boolean) 


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# File 'lib/gcloud/bigquery/data.rb', line 65

def next?
  !token.nil?
end

#raw ⇒ Object

Represents Table Data as a list of positional values (array of arrays). No type conversion is made, e.g. numbers are formatted as strings.



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# File 'lib/gcloud/bigquery/data.rb', line 78

def raw
  Array(gapi["rows"]).map { |row| row["f"].map { |f| f["v"] } }
end

#token ⇒ Object

A token used for paging results.



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# File 'lib/gcloud/bigquery/data.rb', line 49

def token
  @gapi["pageToken"]
end

#total ⇒ Object

The total number of rows in the complete table.



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# File 'lib/gcloud/bigquery/data.rb', line 59

def total
  @gapi["totalRows"]
end