Class: Arel::Table
Class Attribute Summary collapse
Instance Attribute Summary collapse
Instance Method Summary
collapse
#coalesce, #create_and, #create_false, #create_join, #create_on, #create_string_join, #create_table_alias, #create_true, #grouping, #lower
Methods included from Crud
#compile_delete, #compile_insert, #compile_update, #create_insert
Constructor Details
#initialize(name, as: nil, type_caster: nil) ⇒ Table
Returns a new instance of Table.
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# File 'activerecord/lib/arel/table.rb', line 16
def initialize(name, as: nil, type_caster: nil)
@name = name.to_s
@type_caster = type_caster
if as.to_s == @name
as = nil
end
@table_alias = as
end
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Class Attribute Details
Returns the value of attribute engine
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# File 'activerecord/lib/arel/table.rb', line 9
def engine
@engine
end
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Instance Attribute Details
#name ⇒ Object
Also known as:
table_name
Returns the value of attribute name
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# File 'activerecord/lib/arel/table.rb', line 11
def name
@name
end
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#table_alias ⇒ Object
Returns the value of attribute table_alias
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# File 'activerecord/lib/arel/table.rb', line 11
def table_alias
@table_alias
end
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Instance Method Details
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# File 'activerecord/lib/arel/table.rb', line 81
def [](name)
::Arel::Attribute.new self, name
end
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#able_to_type_cast? ⇒ Boolean
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# File 'activerecord/lib/arel/table.rb', line 103
def able_to_type_cast?
!type_caster.nil?
end
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#alias(name = "#{self.name}_2") ⇒ Object
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# File 'activerecord/lib/arel/table.rb', line 29
def alias(name = "#{self.name}_2")
Nodes::TableAlias.new(self, name)
end
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#eql?(other) ⇒ Boolean
Also known as:
==
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# File 'activerecord/lib/arel/table.rb', line 92
def eql?(other)
self.class == other.class &&
self.name == other.name &&
self.table_alias == other.table_alias
end
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# File 'activerecord/lib/arel/table.rb', line 33
def from
SelectManager.new(self)
end
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#group(*columns) ⇒ Object
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# File 'activerecord/lib/arel/table.rb', line 53
def group(*columns)
from.group(*columns)
end
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# File 'activerecord/lib/arel/table.rb', line 85
def hash
@name.hash
end
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#having(expr) ⇒ Object
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# File 'activerecord/lib/arel/table.rb', line 77
def having(expr)
from.having expr
end
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#join(relation, klass = Nodes::InnerJoin) ⇒ Object
#order(*expr) ⇒ Object
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# File 'activerecord/lib/arel/table.rb', line 57
def order(*expr)
from.order(*expr)
end
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#outer_join(relation) ⇒ Object
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# File 'activerecord/lib/arel/table.rb', line 49
def outer_join(relation)
join(relation, Nodes::OuterJoin)
end
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#project(*things) ⇒ Object
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# File 'activerecord/lib/arel/table.rb', line 65
def project(*things)
from.project(*things)
end
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#skip(amount) ⇒ Object
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# File 'activerecord/lib/arel/table.rb', line 73
def skip(amount)
from.skip amount
end
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#take(amount) ⇒ Object
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# File 'activerecord/lib/arel/table.rb', line 69
def take(amount)
from.take amount
end
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#type_cast_for_database(attribute_name, value) ⇒ Object
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# File 'activerecord/lib/arel/table.rb', line 99
def type_cast_for_database(attribute_name, value)
type_caster.type_cast_for_database(attribute_name, value)
end
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#where(condition) ⇒ Object
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# File 'activerecord/lib/arel/table.rb', line 61
def where(condition)
from.where condition
end
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