Class: Searchgasm::Condition::Base

Inherits:
Object
  • Object
show all
Includes:
Shared::Utilities
Defined in:
lib/searchgasm/condition/base.rb

Overview

Conditions condition

The base class for creating a condition. Your custom conditions should extend this class. See Searchgasm::Conditions::Base.register_condition on how to write your own condition.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(klass, options = {}) ⇒ Base

Returns a new instance of Base.



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# File 'lib/searchgasm/condition/base.rb', line 46

def initialize(klass, options = {})
  self.klass = klass
  self.table_name = options[:table_name] || klass.table_name
  
  if options[:column]
    self.column = options[:column].class < ::ActiveRecord::ConnectionAdapters::Column ? options[:column] : klass.columns_hash[options[:column].to_s]
    
    if options[:column_for_type_cast]
      self.column_for_type_cast = options[:column_for_type_cast]
    else
      type = (!self.class.value_type.blank? && self.class.value_type.to_s) || (!options[:column_type].blank? && options[:column_type].to_s) || column.sql_type
      self.column_for_type_cast = column.class.new(column.name, column.default.to_s, type, column.null)
    end
    
    self.column_sql_format = options[:column_sql_format] || "{table}.{column}"
  end
end

Instance Attribute Details

#column ⇒ Object

Returns the value of attribute column.



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# File 'lib/searchgasm/condition/base.rb', line 10

def column
  @column
end

#column_for_type_cast ⇒ Object

Returns the value of attribute column_for_type_cast.



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# File 'lib/searchgasm/condition/base.rb', line 10

def column_for_type_cast
  @column_for_type_cast
end

#column_sql ⇒ Object

Substitutes string vars with table and column name. Allows us to switch the column and table on the fly and have the condition update appropriately. The table name could be variable depending on the condition. Take STI and more than one child model is used in the condition, the first gets the parent table name, the rest get aliases.



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# File 'lib/searchgasm/condition/base.rb', line 66

def column_sql
  @column_sql
end

#column_sql_format ⇒ Object

Returns the value of attribute column_sql_format.



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# File 'lib/searchgasm/condition/base.rb', line 10

def column_sql_format
  @column_sql_format
end

#klass ⇒ Object

Returns the value of attribute klass.



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# File 'lib/searchgasm/condition/base.rb', line 10

def klass
  @klass
end

#table_name ⇒ Object

Returns the value of attribute table_name.



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# File 'lib/searchgasm/condition/base.rb', line 10

def table_name
  @table_name
end

Class Method Details

.condition_names_for_column ⇒ Object

Same as condition_name_for_model, but for a model’s column obj



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# File 'lib/searchgasm/condition/base.rb', line 41

def condition_names_for_column
  [condition_type_name]
end

.condition_names_for_model ⇒ Object

Determines what to call the condition for the model

Searchgasm tries to create conditions on each model. Before it does this it passes the model to this method to see what to call the condition. If the condition type doesnt want to create a condition on a model it will just return nil and Searchgasm will skip over it.



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# File 'lib/searchgasm/condition/base.rb', line 36

def condition_names_for_model
  []
end

.condition_type_name ⇒ Object

Name of the condition type inferred from the class name



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# File 'lib/searchgasm/condition/base.rb', line 16

def condition_type_name
  name.split("::").last.underscore
end

.handle_array_value? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/searchgasm/condition/base.rb', line 20

def handle_array_value?
  handle_array_value == true
end

.ignore_meaningless_value? ⇒ Boolean

:nodoc:

Returns:

  • (Boolean) 


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# File 'lib/searchgasm/condition/base.rb', line 24

def ignore_meaningless_value? # :nodoc:
  ignore_meaningless_value == true
end

.join_arrays_with_or? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/searchgasm/condition/base.rb', line 28

def join_arrays_with_or?
  join_arrays_with_or == true
end

Instance Method Details

#explicitly_set_value=(value) ⇒ Object

Allows nils to be meaninful values



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# File 'lib/searchgasm/condition/base.rb', line 71

def explicitly_set_value=(value)
  @explicitly_set_value = value
end

#explicitly_set_value? ⇒ Boolean

Need this if someone wants to actually use nil in a meaningful way

Returns:

  • (Boolean) 


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# File 'lib/searchgasm/condition/base.rb', line 76

def explicitly_set_value?
  @explicitly_set_value == true
end

#options ⇒ Object 



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# File 'lib/searchgasm/condition/base.rb', line 80

def options
  {:table_name => table_name, :column => column, :column_for_type_cast => column_for_type_cast, :column_sql_format => column_sql_format}
end

#sanitize(alt_value = nil) ⇒ Object

You should refrain from overwriting this method, it performs various tasks before callign your to_conditions method, allowing you to keep to_conditions simple.



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# File 'lib/searchgasm/condition/base.rb', line 85

def sanitize(alt_value = nil) # :nodoc:
  return if value_is_meaningless?
  v = alt_value || value
  if v.is_a?(Array) && !self.class.handle_array_value?
    merge_conditions(*v.collect { |i| sanitize(i) } << {:any => self.class.join_arrays_with_or?})
  else
    v = v.utc if column && v.respond_to?(:utc) && [:time, :timestamp, :datetime].include?(column.type) && klass.time_zone_aware_attributes && !klass.skip_time_zone_conversion_for_attributes.include?(column.name.to_sym)
    to_conditions(v)
  end
end

#value ⇒ Object

The value for the condition



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# File 'lib/searchgasm/condition/base.rb', line 97

def value
  @casted_value ||= type_cast_value(@value)
end

#value=(v) ⇒ Object

Sets the value for the condition



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# File 'lib/searchgasm/condition/base.rb', line 102

def value=(v)
  self.explicitly_set_value = true
  @casted_value = nil
  @value = v
end

#value_is_meaningless? ⇒ Boolean

:nodoc:

Returns:

  • (Boolean) 


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# File 'lib/searchgasm/condition/base.rb', line 108

def value_is_meaningless? # :nodoc:
  meaningless?(@value)
end