Class: Dynamoid::AdapterPlugin::AwsSdkV2::Table

Inherits:
Object
  • Object
show all
Defined in:
lib/dynamoid/adapter_plugin/aws_sdk_v2.rb

Overview

Represents a table. Exposes data from the “DescribeTable” API call, and also provides methods for coercing values to the proper types based on the table’s schema data

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(schema) ⇒ Table

Returns a new instance of Table.

Parameters:

  • schema (Hash) —

    Data returns from a “DescribeTable” call



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# File 'lib/dynamoid/adapter_plugin/aws_sdk_v2.rb', line 779

def initialize(schema)
  @schema = schema[:table]
end

Instance Attribute Details

#schema ⇒ Object (readonly)

Returns the value of attribute schema.



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# File 'lib/dynamoid/adapter_plugin/aws_sdk_v2.rb', line 774

def schema
  @schema
end

Instance Method Details

#col_type(col) ⇒ Object

Returns the API type (e.g. “N”, “S”) for the given column, if the schema defines it, nil otherwise



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# File 'lib/dynamoid/adapter_plugin/aws_sdk_v2.rb', line 801

def col_type(col)
  col = col.to_s
  col_def = schema[:attribute_definitions].find { |d| d[:attribute_name] == col.to_s }
  col_def && col_def[:attribute_type]
end

#hash_key ⇒ Object 



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# File 'lib/dynamoid/adapter_plugin/aws_sdk_v2.rb', line 793

def hash_key
  @hash_key ||= schema[:key_schema].find { |d| d[:key_type] == HASH_KEY  }.try(:attribute_name).to_sym
end

#item_count ⇒ Object 



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# File 'lib/dynamoid/adapter_plugin/aws_sdk_v2.rb', line 807

def item_count
  schema[:item_count]
end

#range_key ⇒ Object 



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# File 'lib/dynamoid/adapter_plugin/aws_sdk_v2.rb', line 783

def range_key
  @range_key ||= schema[:key_schema].find { |d| d[:key_type] == RANGE_KEY }.try(:attribute_name)
end

#range_type ⇒ Object 



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# File 'lib/dynamoid/adapter_plugin/aws_sdk_v2.rb', line 787

def range_type
  range_type ||= schema[:attribute_definitions].find { |d|
    d[:attribute_name] == range_key
  }.try(:fetch,:attribute_type, nil)
end