Class: SimpleRecord::Base

Inherits:
Aws::ActiveSdb::Base
  • Object
show all
Extended by:
Attributes
Includes:
Callbacks, Translations
Defined in:
lib/simple_record.rb

Constant Summary collapse

@@cache_store = 
nil
@@regex_no_id = 
/.*Couldn't find.*with ID.*/
@@debug = 
""

Class Attribute Summary collapse

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Attributes

are_booleans, are_dates, are_ints, belongs_to, define_dirty_methods, defined_attributes, handle_virtuals, has_attributes, has_booleans, has_dates, has_ints, has_many, has_one, has_strings, has_virtuals, included

Methods included from Callbacks

#after_destroy, #before_destroy, included, setup_callbacks

Methods included from Translations

#convert_dates_to_sdb, decrypt, encrypt, pad_and_offset, #pad_and_offset_ints_to_sdb, pass_hash, pass_hash_check, #ruby_to_sdb, #sdb_to_ruby, #to_bool, #to_date, un_offset_int, #unpad, #unpad_self, #wrap_if_required

Constructor Details

#initialize(attrs = {}) ⇒ Base 



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# File 'lib/simple_record.rb', line 108

def initialize(attrs={})
    # todo: Need to deal with objects passed in. iterate through belongs_to perhaps and if in attrs, set the objects id rather than the object itself

    initialize_base(attrs)

    # Convert attributes to sdb values
    attrs.each_pair do |name, value|
        set(name, value, true)
    end
end

Class Attribute Details

.domain_prefix ⇒ Object

Returns the value of attribute domain_prefix.



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# File 'lib/simple_record.rb', line 163

def domain_prefix
  @domain_prefix
end

Instance Attribute Details

#errors ⇒ Object

Returns the value of attribute errors.



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# File 'lib/simple_record.rb', line 160

def errors
  @errors
end

Class Method Details

.all(*args) ⇒ Object 



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# File 'lib/simple_record.rb', line 708

def self.all(*args)
    find(:all, *args)
end

.batch_save(objects, options = {}) ⇒ Object

Run pre_save on each object, then runs batch_put_attributes Returns



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# File 'lib/simple_record.rb', line 473

def self.batch_save(objects, options={})
    results = []
    to_save = []
    if objects && objects.size > 0
        objects.each do |o|
            ok = o.pre_save(options)
            raise "Pre save failed on object [" + o.inspect + "]" if !ok
            results << ok
            next if !ok # todo: this shouldn't be here should it?  raises above
            o.pre_save2
            to_save << Aws::SdbInterface::Item.new(o.id, o.attributes, true)
            if to_save.size == 25 # Max amount SDB will accept
                connection.batch_put_attributes(domain, to_save)
                to_save.clear
            end
        end
    end
    connection.batch_put_attributes(domain, to_save) if to_save.size > 0
    results
end

.cache_key(class_name, id) ⇒ Object 



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# File 'lib/simple_record.rb', line 778

def self.cache_key(class_name, id)
    return class_name + "/" + id.to_s
end

.cache_results(results) ⇒ Object 



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# File 'lib/simple_record.rb', line 764

def self.cache_results(results)
    if !cache_store.nil? && !results.nil?
        if results.is_a?(Array)
            # todo: cache each result
        else
            class_name = results.class.name
            id = results.id
            cache_key = self.cache_key(class_name, id)
            #puts 'caching result at ' + cache_key + ': ' + results.inspect
            cache_store.write(cache_key, results, :expires_in =>30)
        end
    end
end

.cache_store ⇒ Object 



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# File 'lib/simple_record.rb', line 174

def self.cache_store
    return @@cache_store
end

.cache_store=(cache) ⇒ Object

Set the cache to use



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# File 'lib/simple_record.rb', line 170

def self.cache_store=(cache)
    @@cache_store = cache
end

.convert_condition_params(options) ⇒ Object 



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# File 'lib/simple_record.rb', line 752

def self.convert_condition_params(options)
    return if options.nil?
    conditions = options[:conditions]
    if !conditions.nil? && conditions.size > 1
        # all after first are values
        conditions.collect! { |x|
            Translations.pad_and_offset(x)
        }
    end

end

.count(*args) ⇒ Object 



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# File 'lib/simple_record.rb', line 716

def self.count(*args)
    find(:count, *args)
end

.create(attributes = {}) ⇒ Object 



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# File 'lib/simple_record.rb', line 645

def self.create(attributes={})
#            puts "About to create in domain #{domain}"
    super
end

.debug ⇒ Object 



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# File 'lib/simple_record.rb', line 784

def self.debug
    @@debug
end

.delete(id) ⇒ Object

Usage: ClassName.delete id



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# File 'lib/simple_record.rb', line 497

def self.delete(id)
    connection.delete_attributes(domain, id)
end

.delete_all(*params) ⇒ Object 



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# File 'lib/simple_record.rb', line 501

def self.delete_all(*params)
    # could make this quicker by just getting item_names and deleting attributes rather than creating objects
    obs = self.find(params)
    i = 0
    obs.each do |a|
        a.delete
        i+=1
    end
    return i
end

.destroy_all(*params) ⇒ Object 



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# File 'lib/simple_record.rb', line 512

def self.destroy_all(*params)
    obs = self.find(params)
    i = 0
    obs.each do |a|
        a.destroy
        i+=1
    end
    return i
end

.domain ⇒ Object 



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# File 'lib/simple_record.rb', line 201

def self.domain
    #return self.get_domain_name unless self.get_domain_name.nil?
    d = super
#            puts 'in self.domain, d=' + d.to_s + ' domain_prefix=' + SimpleRecord::Base.domain_prefix.to_s
    domain_name_for_class = (SimpleRecord::Base.domain_prefix || "") + d.to_s
    #self.set_domain_name(domain_name_for_class)
    domain_name_for_class
end

.find(*params) ⇒ Object

Usage: Find by ID:

MyModel.find(ID)

Query example:

MyModel.find(:all, :conditions=>["name = ?", name], :order=>"created desc", :limit=>10)



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# File 'lib/simple_record.rb', line 660

def self.find(*params)
    #puts 'params=' + params.inspect
    q_type = :all
    select_attributes=[]

    if params.size > 0
        q_type = params[0]
    end

    # Pad and Offset number attributes
    options = {}
    if params.size > 1
        options = params[1]
        #puts 'options=' + options.inspect
        #puts 'after collect=' + options.inspect
        convert_condition_params(options)
    end
#            puts 'params2=' + params.inspect

    results = q_type == :all ? [] : nil
    begin
        results=super(*params)
#                puts "RESULT=" + results.inspect
        #puts 'params3=' + params.inspect
        SimpleRecord.stats.selects += 1
        if q_type != :count
            cache_results(results)
            if results.is_a?(Array)
                results = SimpleRecord::ResultsArray.new(self, params, results, next_token)
            end
        end
    rescue Aws::AwsError, Aws::ActiveSdb::ActiveSdbError
#                puts "RESCUED: " + $!.message
        if ($!.message().index("NoSuchDomain") != nil)
            # this is ok
        elsif ($!.message() =~ @@regex_no_id)
            results = nil
        else
            raise $!
        end
    end
    return results
end

.first(*args) ⇒ Object 



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# File 'lib/simple_record.rb', line 712

def self.first(*args)
    find(:first, *args)
end

.get_encryption_key ⇒ Object 



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# File 'lib/simple_record.rb', line 411

def self.get_encryption_key()
    key = SimpleRecord.options[:encryption_key]
#            if key.nil?
#                puts 'WARNING: Encrypting attributes with your AWS Access Key. You should use your own :encryption_key so it doesn\'t change'
#                key = connection.aws_access_key_id # default to aws access key. NOT recommended in case you start using a new key
#            end
    return key
end

.inherited(base) ⇒ Object 



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# File 'lib/simple_record.rb', line 141

def self.inherited(base)
    #puts 'SimpleRecord::Base is inherited by ' + base.inspect
    Callbacks.setup_callbacks(base)

#            base.has_strings :id
    base.has_dates :created, :updated
    base.before_create :set_created, :set_updated
    base.before_update :set_updated

end

.paginate(options = {}) ⇒ Object

This gets less and less efficient the higher the page since SimpleDB has no way to start at a specific row. So it will iterate from the first record and pull out the specific pages.



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# File 'lib/simple_record.rb', line 722

def self.paginate(options={})
#            options = args.pop
    puts 'paginate options=' + options.inspect if SimpleRecord.logging?
    page     = options[:page] || 1
    per_page = options[:per_page] || self.per_page || 50
    total    = options[:total_entries]
    options[:limit] = page * per_page
    fr = find(:all, options)
    puts 'fr.size=' + fr.size.to_s
    ret = []
    i = 0
    p = 1
    fr.each do |x|
#                puts 'x=' + x.inspect
        if p == page
#                    puts 'adding'
            ret << x
        end
        i += 1
        if i > 0 && i % per_page == 0
            p += 1
            if p > page
                break
            end
        end
    end
    ret
end

.quote_regexp(a, re) ⇒ Object 



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# File 'lib/simple_record.rb', line 625

def self.quote_regexp(a, re)
    a =~ re
    #was there a match?
    if $&
        before=$`
        middle=$&
        after=$'

        before =~ /'$/ #is there already a quote immediately before the match?
        unless $&
            return "#{before}'#{middle}'#{quote_regexp(after, re)}" #if not, put quotes around the match
        else
            return "#{before}#{middle}#{quote_regexp(after, re)}" #if so, assume it is quoted already and move on
        end
    else
        #no match, just return the string
        return a
    end
end

.sanitize_sql(*params) ⇒ Object 



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# File 'lib/simple_record.rb', line 788

def self.sanitize_sql(*params)
    return ActiveRecord::Base.sanitize_sql(*params)
end

.select(*params) ⇒ Object 



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# File 'lib/simple_record.rb', line 704

def self.select(*params)
    return find(*params)
end

.set_domain_name(table_name) ⇒ Object

Sets the domain name for this class



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# File 'lib/simple_record.rb', line 190

def self.set_domain_name(table_name)
    # puts 'setting domain name for class ' + self.inspect + '=' + table_name
    #@domain_name_for_class = table_name
    super
end

.set_domain_prefix(prefix) ⇒ Object

If you want a domain prefix for all your models, set it here.



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# File 'lib/simple_record.rb', line 179

def self.set_domain_prefix(prefix)
    #puts 'set_domain_prefix=' + prefix
    self.domain_prefix = prefix
end

.set_table_name(table_name) ⇒ Object

Same as set_table_name



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# File 'lib/simple_record.rb', line 185

def self.set_table_name(table_name)
    set_domain_name table_name
end

.table_name ⇒ Object 



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# File 'lib/simple_record.rb', line 792

def self.table_name
    return domain
end

Instance Method Details

#[](attribute) ⇒ Object 



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# File 'lib/simple_record.rb', line 265

def []( attribute)
    super
end

#[]=(attribute, values) ⇒ Object 



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# File 'lib/simple_record.rb', line 260

def []=(attribute, values)
    make_dirty(attribute, values)
    super
end

#cache_store ⇒ Object 



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# File 'lib/simple_record.rb', line 288

def cache_store
    @@cache_store
end

#changed ⇒ Object 



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# File 'lib/simple_record.rb', line 796

def changed
    return @dirty.keys
end

#changed? ⇒ Boolean 



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# File 'lib/simple_record.rb', line 800

def changed?
    return @dirty.size > 0
end

#changes ⇒ Object 



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# File 'lib/simple_record.rb', line 804

def changes
    ret = {}
    #puts 'in CHANGES=' + @dirty.inspect
    @dirty.each_pair {|key, value| ret[key] = [value, get_attribute(key)]}
    return ret
end

#clear_errors ⇒ Object 



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# File 'lib/simple_record.rb', line 256

def clear_errors
    @errors=SimpleRecord_errors.new
end

#defined_attributes_local ⇒ Object 



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# File 'lib/simple_record.rb', line 153

def defined_attributes_local
    #puts 'local defined_attributes'
    ret = self.class.defined_attributes
    ret.merge!(self.class.superclass.defined_attributes) if self.class.superclass.respond_to?(:defined_attributes)
end

#delete ⇒ Object 



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# File 'lib/simple_record.rb', line 522

def delete()
    super
end

#delete_niled(to_delete) ⇒ Object 



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# File 'lib/simple_record.rb', line 600

def delete_niled(to_delete)
#            puts 'to_delete=' + to_delete.inspect
    if to_delete.size > 0
#      puts 'Deleting attributes=' + to_delete.inspect
        SimpleRecord.stats.deletes += 1
        delete_attributes to_delete
    end
end

#destroy ⇒ Object 



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# File 'lib/simple_record.rb', line 526

def destroy
    return run_before_destroy && delete && run_after_destroy
end

#domain ⇒ Object 



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# File 'lib/simple_record.rb', line 197

def domain
    self.class.domain # super # super.domain
end

#domain_ok(ex) ⇒ Object 



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# File 'lib/simple_record.rb', line 292

def domain_ok(ex)
    if (ex.message().index("NoSuchDomain") != nil)
        puts "Creating new SimpleDB Domain: " + domain
        self.class.create_domain
        return true
    end
    return false
end

#get_attribute(arg) ⇒ Object

Since SimpleDB supports multiple attributes per value, the values are an array. This method will return the value unwrapped if it’s the only, otherwise it will return the array.



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# File 'lib/simple_record.rb', line 533

def get_attribute(arg)
#            puts "GET #{arg}"
    # Check if this arg is already converted
    arg_s = arg.to_s
#            instance_var = ("@" + arg_s)
#            puts "defined?(#{instance_var.to_sym}) " + (defined?(instance_var.to_sym)).inspect
#            if defined?(instance_var.to_sym) # this returns "method" for some reason??
#            puts "attribute #{instance_var} is defined"
    @attributes_rb = {} unless @attributes_rb # was getting errors after upgrade.
    ret = @attributes_rb[arg_s] # instance_variable_get(instance_var)
#            puts 'ret from rb=' + ret.inspect
    return ret if !ret.nil?
#            end
    ret = get_attribute_sdb(arg)
#            puts 'ret from atts=' + ret.inspect
    ret = sdb_to_ruby(arg, ret)
#            puts 'ret from atts to rb=' + ret.inspect
#            puts "Setting instance var #{arg_s} to #{ret}"
#            instance_variable_set(instance_var, ret)
    @attributes_rb[arg_s] = ret
    return ret
end

#get_attribute_sdb(name) ⇒ Object 



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# File 'lib/simple_record.rb', line 210

def get_attribute_sdb(name)
#            arg = arg.to_s
#            puts "get_attribute_sdb(#{arg}) - #{arg.class.name}"
#            puts 'self[]=' + self.inspect
    ret = strip_array(@attributes[sdb_att_name(name)])
    return ret
end

#get_atts_to_delete ⇒ Object 



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# File 'lib/simple_record.rb', line 458

def get_atts_to_delete
    # todo: this should use the @dirty hash now
    to_delete = []
    @attributes.each do |key, value|
#                puts 'key=' + key.inspect + ' value=' + value.inspect
        if value.nil? || (value.is_a?(Array) && value.size == 0) || (value.is_a?(Array) && value.size == 1 && value[0] == nil)
            to_delete << key
            @attributes.delete(key)
        end
    end
    return to_delete
end

#hash ⇒ Object 



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# File 'lib/simple_record.rb', line 816

def hash
    # same as ActiveRecord
    id.hash
end

#initialize_base(attrs = {}) ⇒ Object 



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# File 'lib/simple_record.rb', line 119

def initialize_base(attrs={})

    #we have to handle the virtuals.
    Attributes.handle_virtuals(attrs)

    @errors=SimpleRecord_errors.new
    @dirty = {}

    @attributes = {} # sdb values
    @attributes_rb = {} # ruby values
    @new_record = true

end

#initialize_from_db(attrs = {}) ⇒ Object 



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# File 'lib/simple_record.rb', line 133

def initialize_from_db(attrs={})
    initialize_base(attrs)
    attrs.each_pair do |k, v|
        @attributes[k.to_s] = v
    end
end

#invalid? ⇒ Boolean 



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# File 'lib/simple_record.rb', line 323

def invalid?
    !valid?
end

#make_dirty(arg, value) ⇒ Object 



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# File 'lib/simple_record.rb', line 240

def make_dirty(arg, value)
    sdb_att_name = sdb_att_name(arg)
    arg = arg.to_s

#            puts "Marking #{arg} dirty with #{value}"
    if @dirty.include?(sdb_att_name)
        old = @dirty[sdb_att_name]
#                puts "#{sdb_att_name} was already dirty #{old}"
        @dirty.delete(sdb_att_name) if value == old
    else
        old = get_attribute(arg)
#                puts "dirtifying #{sdb_att_name} old=#{old.inspect} to new=#{value.inspect}"
        @dirty[sdb_att_name] = old if value != old
    end
end

#mark_as_old ⇒ Object 



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# File 'lib/simple_record.rb', line 811

def mark_as_old
    super
    @dirty = {}
end

#new_record? ⇒ Boolean 



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# File 'lib/simple_record.rb', line 318

def new_record?
    # todo: new_record in activesdb should align with how we're defining a new record here, ie: if id is nil
    super
end

#pre_save(options) ⇒ Object 



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# File 'lib/simple_record.rb', line 421

def pre_save(options)

    is_create = self[:id].nil?
    ok = run_before_validation && (is_create ? run_before_validation_on_create : run_before_validation_on_update)
    return false unless ok

    validate()

    is_create ? validate_on_create : validate_on_update
#      puts 'AFTER VALIDATIONS, ERRORS=' + errors.inspect
    if (!@errors.nil? && @errors.length > 0 )
#        puts 'THERE ARE ERRORS, returning false'
        return false
    end

    ok = run_after_validation && (is_create ? run_after_validation_on_create : run_after_validation_on_update)
    return false unless ok

    ok = respond_to?('before_save') ? before_save : true
    if ok
        if is_create && respond_to?('before_create')
            ok = before_create
        elsif !is_create && respond_to?('before_update')
            ok = before_update
        end
    end
    if ok
        ok = run_before_save && (is_create ? run_before_create : run_before_update)
    end
    if ok
        # Now translate all fields into SimpleDB friendly strings
#                convert_all_atts_to_sdb()
    end
    ok
end

#reload ⇒ Object 



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# File 'lib/simple_record.rb', line 609

def reload
    super()
end

#save(options = {}) ⇒ Object

Options:

- :except => Array of attributes to NOT save
- :dirty => true - Will only store attributes that were modified. To make it save regardless and have it update the :updated value, include this and set it to false.



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# File 'lib/simple_record.rb', line 345

def save(options={})
#            puts 'SAVING: ' + self.inspect
    # todo: Clean out undefined values in @attributes (in case someone set the attributes hash with values that they hadn't defined)
    clear_errors
    # todo: decide whether this should go before pre_save or after pre_save? pre_save dirties "updated" and perhaps other items due to callbacks
    if options[:dirty]
#                puts '@dirtyA=' + @dirty.inspect
        return true if @dirty.size == 0 # Nothing to save so skip it
    end
    is_create = self[:id].nil?
    ok = pre_save(options)
    if ok
        begin
            if options[:dirty]
#                        puts '@dirty=' + @dirty.inspect
                return true if @dirty.size == 0 # This should probably never happen because after pre_save, created/updated dates are changed
                options[:dirty_atts] = @dirty
            end
            to_delete = get_atts_to_delete # todo: this should use the @dirty hash now
            SimpleRecord.stats.puts += 1
#                    puts 'SELF BEFORE super=' + self.inspect
            if super(options)
#                        puts 'SELF AFTER super=' + self.inspect
                self.class.cache_results(self)
                delete_niled(to_delete)
                if (is_create ? run_after_create : run_after_update) && run_after_save
#                            puts 'all good?'
                    return true
                else
                    return false
                end
            else
                return false
            end
        rescue Aws::AwsError
            # puts "RESCUED in save: " + $!
            if (domain_ok($!))
                if !@create_domain_called
                    @create_domain_called = true
                    save(options)
                else
                    raise $!
                end
            else
                raise $!
            end
        end
    else
        #@debug = "not saved"
        return false
    end
end

#save!(options = {}) ⇒ Object 



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# File 'lib/simple_record.rb', line 398

def save!(options={})
    save(options) || raise(RecordNotSaved)
end

#save_with_validation!(options = {}) ⇒ Object 



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# File 'lib/simple_record.rb', line 402

def save_with_validation!(options={})
    if valid?
        save
    else
        raise RecordInvalid.new(self)
    end
end

#sdb_att_name(name) ⇒ Object 



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# File 'lib/simple_record.rb', line 218

def sdb_att_name(name)
    att_meta = defined_attributes_local[name.to_sym]
    if att_meta.type == :belongs_to
        return "#{name}_id"
    end
    name.to_s
end

#set(name, value, dirtify = true) ⇒ Object 



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# File 'lib/simple_record.rb', line 556

def set(name, value, dirtify=true)
#            puts "SET #{name}=#{value.inspect}"
#            puts "self=" + self.inspect
    att_meta = defined_attributes_local[name.to_sym]
    if att_meta.nil?
        # check if it ends with id and see if att_meta is there
        ends_with = name.to_s[-3, 3]
        if ends_with == "_id"
#                    puts 'ends with id'
            n2 = name.to_s[0, name.length-3]
#                    puts 'n2=' + n2
            att_meta = defined_attributes_local[n2.to_sym]
#                    puts 'defined_attributes_local=' + defined_attributes_local.inspect
            attname = name.to_s
            attvalue = value
            name = n2
        end
        return if att_meta.nil?
    else
        if att_meta.type == :belongs_to
            attname = name.to_s + '_id'
            attvalue = value.nil? ? nil : value.id
        else
            attname = name.to_s
            attvalue = att_meta.init_value(value)
#                  attvalue = value
            #puts 'converted ' + value.inspect + ' to ' + attvalue.inspect
        end
    end
    attvalue = strip_array(attvalue)
    make_dirty(name, attvalue) if dirtify
#            puts "ARG=#{attname.to_s} setting to #{attvalue}"
    sdb_val = ruby_to_sdb(name, attvalue)
#            puts "sdb_val=" + sdb_val.to_s
    @attributes[attname] = sdb_val
#            attvalue = wrap_if_required(name, attvalue, sdb_val)
#            puts 'attvalue2=' + attvalue.to_s
    @attributes_rb.delete(name.to_s) # todo: we should set the value here so it doesn't reget anything


#            instance_var = "@" + attname.to_s
#            instance_variable_set(instance_var, attvalue)
end

#set_created ⇒ Object 



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# File 'lib/simple_record.rb', line 270

def set_created
#    puts 'SETTING CREATED'
    #    @created = DateTime.now
    set(:created, Time.now)
#            self[:created] = Time.now
#    @tester = 'some test value'
    #    self[:tester] = 'some test value'
end

#set_updated ⇒ Object 



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# File 'lib/simple_record.rb', line 279

def set_updated
    #puts 'SETTING UPDATED'
    #    @updated = DateTime.now
    set(:updated, Time.now)
#            self[:updated] = Time.now
#    @tester = 'some test value updated'
end

#strip_array(arg) ⇒ Object 



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# File 'lib/simple_record.rb', line 226

def strip_array(arg)
    if arg.class==Array
        if arg.length==1
            ret = arg[0]
        else
            ret = arg
        end
    else
        ret = arg
    end
    return ret
end

#update_attributes(atts) ⇒ Object 



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# File 'lib/simple_record.rb', line 614

def update_attributes(atts)
    set_attributes(atts)
    save
end

#update_attributes!(atts) ⇒ Object 



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# File 'lib/simple_record.rb', line 619

def update_attributes!(atts)
    set_attributes(atts)
    save!
end

#valid? ⇒ Boolean 



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# File 'lib/simple_record.rb', line 301

def valid?
    errors.clear

#            run_callbacks(:validate)
    validate

    if new_record?
#                run_callbacks(:validate_on_create)
        validate_on_create
    else
#                run_callbacks(:validate_on_update)
        validate_on_update
    end

    errors.empty?
end

#validate ⇒ Object 



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# File 'lib/simple_record.rb', line 327

def validate
    true
end

#validate_on_create ⇒ Object 



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# File 'lib/simple_record.rb', line 331

def validate_on_create
    true
end

#validate_on_update ⇒ Object 



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# File 'lib/simple_record.rb', line 335

def validate_on_update
    true
end