Class: DynaModel::Table
- Inherits:
-
Object
- Object
- DynaModel::Table
- Extended by:
- AWS::DynamoDB::Types
- Defined in:
- lib/dyna_model/table.rb
Constant Summary collapse
- RETURNED_CONSUMED_CAPACITY =
{ none: "NONE", total: "TOTAL" }
- TYPE_INDICATOR =
{ b: "B", n: "N", s: "S", ss: "SS", ns: "NS" }
- RETURN_VALUES =
{ none: "NONE", all_old: "ALL_OLD", updated_old: "UPDATED_OLD", all_new: "ALL_NEW", updated_new: "UPDATED_NEW" }
- RETURN_VALUES_UPDATE_ONLY =
[ :updated_old, :all_new, :updated_new ]
- QUERY_SELECT =
{ all: "ALL_ATTRIBUTES", projected: "ALL_PROJECTED_ATTRIBUTES", count: "COUNT", specific: "SPECIFIC_ATTRIBUTES" }
- COMPARISON_OPERATOR =
{ eq: "EQ", le: "LE", lt: "LT", ge: "GE", gt: "GT", begins_with: "BEGINS_WITH", between: "BETWEEN", # Scan only ne: "NE", not_null: "NOT_NULL", null: "NULL", contains: "CONTAINS", not_contains: "NOT_CONTAINS", in: "IN" }
- CONDITIONAL_OPERATOR =
{ and: "AND", or: "OR" }
- COMPARISON_OPERATOR_SCAN_ONLY =
[ :ne, :not_null, :null, :contains, :not_contains, :in ]
Instance Attribute Summary collapse
-
#client ⇒ Object
readonly
Returns the value of attribute client.
-
#hash_key ⇒ Object
readonly
Returns the value of attribute hash_key.
-
#range_keys ⇒ Object
readonly
Returns the value of attribute range_keys.
-
#schema_loaded_from_dynamo ⇒ Object
readonly
Returns the value of attribute schema_loaded_from_dynamo.
-
#table_schema ⇒ Object
readonly
Returns the value of attribute table_schema.
Class Method Summary collapse
Instance Method Summary collapse
- #batch_get_item(keys, options = {}) ⇒ Object
- #delete_item(options = {}) ⇒ Object
- #get_item(hash_key, options = {}) ⇒ Object
- #hash_key_condition_param(hash_key, value) ⇒ Object
- #hash_key_item_param(value) ⇒ Object
-
#initialize(model) ⇒ Table
constructor
A new instance of Table.
- #load_schema ⇒ Object
-
#query(hash_value, options = {}) ⇒ Object
options * consistent_read * return_consumed_capacity * order * select * range.
-
#scan(options = {}) ⇒ Object
Perform a table scan docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_Scan.html.
- #validate_key_schema ⇒ Object
- #write(attributes, options = {}) ⇒ Object
Constructor Details
#initialize(model) ⇒ Table
Returns a new instance of Table.
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# File 'lib/dyna_model/table.rb', line 87 def initialize(model) @model = model @table_schema = model.table_schema self.load_schema self.validate_key_schema end |
Instance Attribute Details
#client ⇒ Object (readonly)
Returns the value of attribute client.
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# File 'lib/dyna_model/table.rb', line 6 def client @client end |
#hash_key ⇒ Object (readonly)
Returns the value of attribute hash_key.
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# File 'lib/dyna_model/table.rb', line 6 def hash_key @hash_key end |
#range_keys ⇒ Object (readonly)
Returns the value of attribute range_keys.
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# File 'lib/dyna_model/table.rb', line 6 def range_keys @range_keys end |
#schema_loaded_from_dynamo ⇒ Object (readonly)
Returns the value of attribute schema_loaded_from_dynamo.
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# File 'lib/dyna_model/table.rb', line 6 def schema_loaded_from_dynamo @schema_loaded_from_dynamo end |
#table_schema ⇒ Object (readonly)
Returns the value of attribute table_schema.
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# File 'lib/dyna_model/table.rb', line 6 def table_schema @table_schema end |
Class Method Details
.attr_with_type(attr_name, value) ⇒ Object
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# File 'lib/dyna_model/table.rb', line 83 def self.attr_with_type(attr_name, value) { attr_name => { TYPE_INDICATOR[type_from_value(value)] => value.to_s } } end |
.type_from_value(value) ⇒ Object
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# File 'lib/dyna_model/table.rb', line 73 def self.type_from_value(value) case when value.kind_of?(AWS::DynamoDB::Binary) then :b when value.respond_to?(:to_str) then :s when value.kind_of?(Numeric) then :n else raise ArgumentError, "unsupported attribute type #{value.class}" end end |
Instance Method Details
#batch_get_item(keys, options = {}) ⇒ Object
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# File 'lib/dyna_model/table.rb', line 292 def batch_get_item(keys, ={}) [:return_consumed_capacity] ||= :none [:select] ||= [] # no :projected option, always an array or :all [:consistent_read] = false unless [:consistent_read] raise ArgumentError, "must include between 1 - 100 keys" if keys.size == 0 || keys.size > 100 keys_request = [] keys.each do |k| key_request = {} if @primary_range_key hash_value, range_value = k.split(@model.guid_delimiter) else hash_value = k end key_request[@hash_key[:attribute_name]] = { @hash_key[:attribute_type] => hash_value.to_s } if @primary_range_key raise ArgumentError, "every key must include a range_value" if range_value.blank? key_request[@primary_range_key[:attribute_name]] = { @primary_range_key[:attribute_type] => range_value.to_s } end keys_request << key_request end request_items_request = {} request_items_request.merge!( keys: keys_request ) if [:select].blank? [:select] = :all # for obj_from_attrs else request_items_request.merge!( attributes_to_get: [[:select]].flatten ) end request_items_request.merge!( consistent_read: [:consistent_read] ) if [:consistent_read] batch_get_item_request = { request_items: { @model.dynamo_db_table_name([:shard_name]) => request_items_request }, return_consumed_capacity: RETURNED_CONSUMED_CAPACITY[[:return_consumed_capacity]] } @model.dynamo_db_client.batch_get_item(batch_get_item_request) end |
#delete_item(options = {}) ⇒ Object
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# File 'lib/dyna_model/table.rb', line 407 def delete_item(={}) raise ":delete_item => {...key_values...} required" unless [:delete_item].present? [:return_consumed_capacity] ||= :none [:return_values] ||= :none raise ArgumentError, ":return_values must be one of (#{(RETURN_VALUES.keys - RETURN_VALUES_UPDATE_ONLY).join(", ")})" unless RETURN_VALUES[[:return_values]] && !RETURN_VALUES_UPDATE_ONLY.include?([:return_values]) key_request = { @hash_key[:attribute_name] => { @hash_key[:attribute_type] => [:delete_item][:hash_value].to_s } } if @primary_range_key raise ArgumentError, "range_key was not provided to the delete_item command" if [:delete_item][:range_value].blank? key_request.merge!({ @primary_range_key[:attribute_name] => { @primary_range_key[:attribute_type] => [:delete_item][:range_value].to_s } }) end expected = {} conditional_operator = nil if [:expected] raise ArgumentError, ":expected must be a hash" unless [:expected].is_a?(Hash) [:expected].each_pair do |k,v| expected.merge!(self.attr_with_condition({ k => v})) end if [:conditional_operator] raise ArgumentError, ":condition_operator invalid! Must be one of (#{CONDITIONAL_OPERATOR.keys.join(", ")})" unless CONDITIONAL_OPERATOR[[:conditional_operator]] conditional_operator = CONDITIONAL_OPERATOR[[:conditional_operator]] end end delete_item_request = { table_name: @model.dynamo_db_table_name([:shard_name]), key: key_request, return_consumed_capacity: RETURNED_CONSUMED_CAPACITY[[:return_consumed_capacity]], return_values: RETURN_VALUES[[:return_values]] } delete_item_request.merge!(expected: expected) unless expected.blank? delete_item_request.merge!(conditional_operator: conditional_operator) unless conditional_operator.blank? || expected.blank? @model.dynamo_db_client.delete_item(delete_item_request) end |
#get_item(hash_key, options = {}) ⇒ Object
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# File 'lib/dyna_model/table.rb', line 182 def get_item(hash_key, ={}) [:consistent_read] = false unless [:consistent_read] [:return_consumed_capacity] ||= :none # "NONE" # || "TOTAL" [:select] ||= [] # no :projected option, always an array or :all raise ArgumentError, "Invalid :select. GetItem :select must be an Array (blank for :all)" unless [:select].is_a?(Array) get_item_request = { table_name: @model.dynamo_db_table_name([:shard_name]), key: hash_key_item_param(hash_key), consistent_read: [:consistent_read], return_consumed_capacity: RETURNED_CONSUMED_CAPACITY[[:return_consumed_capacity]] } if [:select].blank? [:select] = :all # for obj_from_attrs else get_item_request.merge!( attributes_to_get: [[:select]].flatten ) end @model.dynamo_db_client.get_item(get_item_request) end |
#hash_key_condition_param(hash_key, value) ⇒ Object
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# File 'lib/dyna_model/table.rb', line 172 def hash_key_condition_param(hash_key, value) hash_key_type = @table_schema[:attribute_definitions].find{|h| h[:attribute_name] == hash_key}[:attribute_type] { hash_key => { attribute_value_list: [hash_key_type => value.to_s], comparison_operator: COMPARISON_OPERATOR[:eq] } } end |
#hash_key_item_param(value) ⇒ Object
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# File 'lib/dyna_model/table.rb', line 166 def hash_key_item_param(value) hash_key = @table_schema[:key_schema].find{|h| h[:key_type] == "HASH"}[:attribute_name] hash_key_type = @table_schema[:attribute_definitions].find{|h| h[:attribute_name] == hash_key}[:attribute_type] { hash_key => { hash_key_type => value.to_s } } end |
#load_schema ⇒ Object
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# File 'lib/dyna_model/table.rb', line 94 def load_schema @schema_loaded_from_dynamo = @model.describe_table @schema_loaded_from_dynamo[:table][:key_schema].each do |key| key_attr = @table_schema[:attribute_definitions].find{|h| h[:attribute_name] == key[:attribute_name]} next if key_attr.nil? key_schema_attr = { attribute_name: key[:attribute_name], attribute_type: key_attr[:attribute_type] } if key[:key_type] == "HASH" @hash_key = key_schema_attr else (@range_keys ||= []) << key_schema_attr.merge(:primary_range_key => true) @primary_range_key = key_schema_attr.merge(:primary_range_key => true) end end if @schema_loaded_from_dynamo[:table][:local_secondary_indexes] || @schema_loaded_from_dynamo[:table][:global_secondary_indexes] ((@schema_loaded_from_dynamo[:table][:local_secondary_indexes] || []) + (@schema_loaded_from_dynamo[:table][:global_secondary_indexes] || [])).each do |key| si_range_key = key[:key_schema].find{|h| h[:key_type] == "RANGE" } next if si_range_key.nil? si_range_attribute = @table_schema[:attribute_definitions].find{|h| h[:attribute_name] == si_range_key[:attribute_name]} next if si_range_attribute.nil? (@range_keys ||= []) << { attribute_name: si_range_key[:attribute_name], attribute_type: si_range_attribute[:attribute_type], index_name: key[:index_name] } end end @schema_loaded_from_dynamo end |
#query(hash_value, options = {}) ⇒ Object
options
* consistent_read
* return_consumed_capacity
* order
* select
* range
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# File 'lib/dyna_model/table.rb', line 208 def query(hash_value, ={}) [:consistent_read] = false unless [:consistent_read] [:return_consumed_capacity] ||= :none # "NONE" # || "TOTAL" [:order] ||= :desc #options[:index_name] ||= :none #AWS::DynamoDB::Errors::ValidationException: ALL_PROJECTED_ATTRIBUTES can be used only when Querying using an IndexName #options[:limit] ||= 10 #options[:exclusive_start_key] #options[:query_filter] key_conditions = {} gsi = nil if [:global_secondary_index] gsi = @table_schema[:global_secondary_indexes].select{ |gsi| gsi[:index_name].to_s == [:global_secondary_index].to_s}.first raise ArgumentError, "Could not find Global Secondary Index '#{[:global_secondary_index]}'" unless gsi gsi_hash_key = gsi[:key_schema].find{|h| h[:key_type] == "HASH"}[:attribute_name] key_conditions.merge!(hash_key_condition_param(gsi_hash_key, hash_value)) else hash_key = @table_schema[:key_schema].find{|h| h[:key_type] == "HASH"}[:attribute_name] key_conditions.merge!(hash_key_condition_param(hash_key, hash_value)) end query_request = { table_name: @model.dynamo_db_table_name([:shard_name]), key_conditions: key_conditions, consistent_read: [:consistent_read], return_consumed_capacity: RETURNED_CONSUMED_CAPACITY[[:return_consumed_capacity]], scan_index_forward: ([:order] == :asc) } if [:range] raise ArgumentError, "Table does not use a range key in its schema!" if @range_keys.blank? attr_with_condition_hash = self.attr_with_condition([:range]) range_key = @range_keys.find{|k| k[:attribute_name] == attr_with_condition_hash.keys.first} raise ArgumentError, ":range key must be a valid Range attribute" unless range_key if range_key.has_key?(:index_name) # Local/Global Secondary Index [:index_name] = range_key[:index_name] query_request[:index_name] = range_key[:index_name] end key_conditions.merge!(attr_with_condition_hash) end query_filter = {} conditional_operator = nil if [:query_filter] raise ArgumentError, ":query_filter must be a hash" unless [:query_filter].is_a?(Hash) [:query_filter].each_pair do |k,v| query_filter.merge!(self.attr_with_condition({ k => v})) end if [:conditional_operator] raise ArgumentError, ":condition_operator invalid! Must be one of (#{CONDITIONAL_OPERATOR.keys.join(", ")})" unless CONDITIONAL_OPERATOR[[:conditional_operator]] conditional_operator = CONDITIONAL_OPERATOR[[:conditional_operator]] end end query_request.merge!(query_filter: query_filter) unless query_filter.blank? query_request.merge!(conditional_operator: conditional_operator) unless conditional_operator.blank? || query_filter.blank? if [:global_secondary_index] # Override index_name if using GSI # You can only select projected attributes from a GSI [:select] = :projected #if options[:select].blank? [:index_name] = gsi[:index_name] query_request.merge!(index_name: gsi[:index_name]) end [:select] ||= :all # :all, :projected, :count, [] if [:select].is_a?(Array) attrs_to_select = [[:select].map(&:to_s)].flatten attrs_to_select << @hash_key[:attribute_name] attrs_to_select << @primary_range_key[:attribute_name] if @primary_range_key query_request.merge!({ select: QUERY_SELECT[:specific], attributes_to_get: attrs_to_select.uniq }) else query_request.merge!({ select: QUERY_SELECT[[:select]] }) end query_request.merge!({ limit: [:limit].to_i }) if .has_key?(:limit) query_request.merge!({ exclusive_start_key: [:exclusive_start_key] }) if [:exclusive_start_key] @model.dynamo_db_client.query(query_request) end |
#scan(options = {}) ⇒ Object
Perform a table scan docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_Scan.html
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# File 'lib/dyna_model/table.rb', line 453 def scan(={}) [:return_consumed_capacity] ||= :none # "NONE" # || "TOTAL" # Default if not already set [:select] ||= :all # :all, :projected, :count, [] scan_request = { table_name: @model.dynamo_db_table_name([:shard_name]), return_consumed_capacity: RETURNED_CONSUMED_CAPACITY[[:return_consumed_capacity]] } scan_request.merge!({ limit: [:limit].to_i }) if .has_key?(:limit) scan_request.merge!({ exclusive_start_key: [:exclusive_start_key] }) if [:exclusive_start_key] if [:select].is_a?(Array) attrs_to_select = [[:select].map(&:to_s)].flatten attrs_to_select << @hash_key[:attribute_name] attrs_to_select << @primary_range_key[:attribute_name] if @primary_range_key scan_request.merge!({ select: QUERY_SELECT[:specific], attributes_to_get: attrs_to_select.uniq }) else scan_request.merge!({ select: QUERY_SELECT[[:select]] }) end # :scan_filter => { :name.begins_with => "a" } scan_filter = {} conditional_operator = nil if [:scan_filter].present? [:scan_filter].each_pair.each do |k,v| scan_filter.merge!(self.attr_with_condition({ k => v})) end end if [:conditional_operator] raise ArgumentError, ":condition_operator invalid! Must be one of (#{CONDITIONAL_OPERATOR.keys.join(", ")})" unless CONDITIONAL_OPERATOR[[:conditional_operator]] conditional_operator = CONDITIONAL_OPERATOR[[:conditional_operator]] end scan_request.merge!(scan_filter: scan_filter) unless scan_filter.blank? scan_request.merge!(conditional_operator: conditional_operator) unless conditional_operator.blank? || scan_filter.blank? scan_request.merge!(segment: [:segment].to_i) if [:segment].present? scan_request.merge!(total_segments: [:total_segments].to_i) if [:total_segments].present? @model.dynamo_db_client.scan(scan_request) end |
#validate_key_schema ⇒ Object
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# File 'lib/dyna_model/table.rb', line 130 def validate_key_schema if @schema_loaded_from_dynamo[:table][:key_schema].sort_by { |k| k[:key_type] } != @table_schema[:key_schema].sort_by { |k| k[:key_type] } raise ArgumentError, "It appears your key schema (Hash Key/Range Key) have changed from the table definition. Rebuilding the table is necessary." end if @schema_loaded_from_dynamo[:table][:attribute_definitions].sort_by { |k| k[:attribute_name] } != @table_schema[:attribute_definitions].sort_by { |k| k[:attribute_name] } raise ArgumentError, "It appears your attribute definition (types?) have changed from the table definition. Rebuilding the table is necessary." end index_keys_to_reject = [:index_status, :index_size_bytes, :item_count] if @schema_loaded_from_dynamo[:table][:local_secondary_indexes].blank? != @table_schema[:local_secondary_indexes].blank? raise ArgumentError, "It appears your local secondary indexes have changed from the table definition. Rebuilding the table is necessary." end if @schema_loaded_from_dynamo[:table][:local_secondary_indexes] && (@schema_loaded_from_dynamo[:table][:local_secondary_indexes].dup.collect {|i| i.delete_if{|k, v| index_keys_to_reject.include?(k) }; i }.sort_by { |lsi| lsi[:index_name] } != @table_schema[:local_secondary_indexes].sort_by { |lsi| lsi[:index_name] }) raise ArgumentError, "It appears your local secondary indexes have changed from the table definition. Rebuilding the table is necessary." end if @schema_loaded_from_dynamo[:table][:global_secondary_indexes].blank? != @table_schema[:global_secondary_indexes].blank? raise ArgumentError, "It appears your global secondary indexes have changed from the table definition. Rebuilding the table is necessary." end if @schema_loaded_from_dynamo[:table][:global_secondary_indexes] && (@schema_loaded_from_dynamo[:table][:global_secondary_indexes].dup.collect {|i| i.delete_if{|k, v| index_keys_to_reject.include?(k) }; i }.sort_by { |gsi| gsi[:index_name] } != @table_schema[:global_secondary_indexes].sort_by { |gsi| gsi[:index_name] }) raise ArgumentError, "It appears your global secondary indexes have changed from the table definition. Rebuilding the table is necessary." end if @schema_loaded_from_dynamo[:table][:provisioned_throughput][:read_capacity_units] != @table_schema[:provisioned_throughput][:read_capacity_units] DynaModel::Config.logger.error "read_capacity_units mismatch. Need to update table?" end if @schema_loaded_from_dynamo[:table][:provisioned_throughput][:write_capacity_units] != @table_schema[:provisioned_throughput][:write_capacity_units] DynaModel::Config.logger.error "write_capacity_units mismatch. Need to update table?" end end |
#write(attributes, options = {}) ⇒ Object
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# File 'lib/dyna_model/table.rb', line 329 def write(attributes, ={}) [:return_consumed_capacity] ||= :none [:return_values] ||= :none [:update_item] = false unless [:update_item] expected = {} conditional_operator = nil if [:expected] raise ArgumentError, ":expected must be a hash" unless [:expected].is_a?(Hash) [:expected].each_pair do |k,v| expected.merge!(self.attr_with_condition({ k => v})) end if [:conditional_operator] raise ArgumentError, ":condition_operator invalid! Must be one of (#{CONDITIONAL_OPERATOR.keys.join(", ")})" unless CONDITIONAL_OPERATOR[[:conditional_operator]] conditional_operator = CONDITIONAL_OPERATOR[[:conditional_operator]] end end if [:update_item] # UpdateItem key_request = { @hash_key[:attribute_name] => { @hash_key[:attribute_type] => [:update_item][:hash_value].to_s, } } if @primary_range_key raise ArgumentError, "range_key was not provided to the write command" if [:update_item][:range_value].blank? key_request.merge!({ @primary_range_key[:attribute_name] => { @primary_range_key[:attribute_type] => [:update_item][:range_value].to_s } }) end attrs_to_update = {} attributes.each_pair do |k,v| next if k == @hash_key[:attribute_name] || (@primary_range_key && k == @primary_range_key[:attribute_name]) if v.nil? attrs_to_update.merge!({ k => { :action => "DELETE" } }) else attrs_to_update.merge!({ k => { value: self.class.attr_with_type(k,v).values.last, action: "PUT" } }) end end raise ArgumentError, ":return_values must be one of (#{RETURN_VALUES.keys.join(", ")})" unless RETURN_VALUES[[:return_values]] update_item_request = { table_name: @model.dynamo_db_table_name([:shard_name]), key: key_request, attribute_updates: attrs_to_update, return_consumed_capacity: RETURNED_CONSUMED_CAPACITY[[:return_consumed_capacity]], return_values: RETURN_VALUES[[:return_values]] } update_item_request.merge!(expected: expected) unless expected.blank? update_item_request.merge!(conditional_operator: conditional_operator) unless conditional_operator.blank? || expected.blank? @model.dynamo_db_client.update_item(update_item_request) else # PutItem items = {} attributes.each_pair do |k,v| next if v.blank? # If empty string or nil, skip... items.merge!(self.class.attr_with_type(k,v)) end raise ArgumentError, ":return_values must be one of (#{(RETURN_VALUES.keys - RETURN_VALUES_UPDATE_ONLY).join(", ")})" unless RETURN_VALUES[[:return_values]] && !RETURN_VALUES_UPDATE_ONLY.include?([:return_values]) put_item_request = { table_name: @model.dynamo_db_table_name([:shard_name]), item: items, return_consumed_capacity: RETURNED_CONSUMED_CAPACITY[[:return_consumed_capacity]], return_values: RETURN_VALUES[[:return_values]] } put_item_request.merge!(expected: expected) unless expected.blank? put_item_request.merge!(conditional_operator: conditional_operator) unless conditional_operator.blank? || expected.blank? @model.dynamo_db_client.put_item(put_item_request) end end |