Module: ClosureTree::Model

Extended by:
ActiveSupport::Concern
Defined in:
lib/closure_tree/model.rb

Instance Method Summary collapse

Instance Method Details

#_ct ⇒ Object

Delegate to the Support instance on the class:



53
54
55
 
# File 'lib/closure_tree/model.rb', line 53

def _ct
  self.class._ct
end

#_ct_id ⇒ Object 



152
153
154
 
# File 'lib/closure_tree/model.rb', line 152

def _ct_id
  read_attribute(_ct.model_class.primary_key)
end

#_ct_parent_id ⇒ Object 



144
145
146
 
# File 'lib/closure_tree/model.rb', line 144

def _ct_parent_id
  read_attribute(_ct.parent_column_sym)
end

#_ct_quoted_id ⇒ Object 



156
157
158
 
# File 'lib/closure_tree/model.rb', line 156

def _ct_quoted_id
  _ct.quoted_value(_ct_id)
end

#_ct_quoted_parent_id ⇒ Object 



148
149
150
 
# File 'lib/closure_tree/model.rb', line 148

def _ct_quoted_parent_id
  _ct.quoted_value(_ct_parent_id)
end

#add_child(child_node) ⇒ Object

Alias for appending to the children collection. You can also add directly to the children collection, if you’d prefer.



139
140
141
142
 
# File 'lib/closure_tree/model.rb', line 139

def add_child(child_node)
  children << child_node
  child_node
end

#ancestor_ids ⇒ Object 



94
95
96
 
# File 'lib/closure_tree/model.rb', line 94

def ancestor_ids
  _ct.ids_from(ancestors)
end

#ancestors ⇒ Object

enumerable of ancestors, immediate parent is first, root is last.



90
91
92
 
# File 'lib/closure_tree/model.rb', line 90

def ancestors
  without_self(self_and_ancestors)
end

#ancestry_path(to_s_column = _ct.name_column) ⇒ Object

Returns an array, root first, of self_and_ancestors’ values of the to_s_column, which defaults to the name_column. (so child.ancestry_path == %w{grandparent parent child}



105
106
107
 
# File 'lib/closure_tree/model.rb', line 105

def ancestry_path(to_s_column = _ct.name_column)
  self_and_ancestors.map { |n| n.send to_s_column.to_sym }.reverse
end

#child? ⇒ Boolean

Returns true if this node has a parent, and is not a root.

Returns:

  • (Boolean) 


65
66
67
 
# File 'lib/closure_tree/model.rb', line 65

def child?
  !root?
end

#child_ids ⇒ Object 



109
110
111
 
# File 'lib/closure_tree/model.rb', line 109

def child_ids
  _ct.ids_from(children)
end

#depth ⇒ Object Also known as: level 



83
84
85
 
# File 'lib/closure_tree/model.rb', line 83

def depth
  ancestors.size
end

#descendant_ids ⇒ Object 



121
122
123
 
# File 'lib/closure_tree/model.rb', line 121

def descendant_ids
  _ct.ids_from(descendants)
end

#descendants ⇒ Object 



113
114
115
 
# File 'lib/closure_tree/model.rb', line 113

def descendants
  without_self(self_and_descendants)
end

#leaf? ⇒ Boolean

Returns true if this node has no children.

Returns:

  • (Boolean) 


70
71
72
 
# File 'lib/closure_tree/model.rb', line 70

def leaf?
  children.empty?
end

#leaves ⇒ Object 



79
80
81
 
# File 'lib/closure_tree/model.rb', line 79

def leaves
  self_and_descendants.leaves
end

#root ⇒ Object

Returns the farthest ancestor, or self if root?



75
76
77
 
# File 'lib/closure_tree/model.rb', line 75

def root
  self_and_ancestors.where(_ct.parent_column_name.to_sym => nil).first
end

#root? ⇒ Boolean

Returns true if this node has no parents.

Returns:

  • (Boolean) 


58
59
60
61
62
 
# File 'lib/closure_tree/model.rb', line 58

def root?
  # Accessing the parent will fetch that row from the database,
  # so if we are persisted, just check that the parent_id column is nil.
  persisted? ? _ct_parent_id.nil? : parent.nil?
end

#self_and_ancestors_ids ⇒ Object 



98
99
100
 
# File 'lib/closure_tree/model.rb', line 98

def self_and_ancestors_ids
  _ct.ids_from(self_and_ancestors)
end

#self_and_descendant_ids ⇒ Object 



117
118
119
 
# File 'lib/closure_tree/model.rb', line 117

def self_and_descendant_ids
  _ct.ids_from(self_and_descendants)
end

#self_and_siblings ⇒ Object 



125
126
127
 
# File 'lib/closure_tree/model.rb', line 125

def self_and_siblings
  _ct.scope_with_order(_ct.base_class.where(_ct.parent_column_sym => _ct_parent_id))
end

#sibling_ids ⇒ Object 



133
134
135
 
# File 'lib/closure_tree/model.rb', line 133

def sibling_ids
  _ct.ids_from(siblings)
end

#siblings ⇒ Object 



129
130
131
 
# File 'lib/closure_tree/model.rb', line 129

def siblings
  without_self(self_and_siblings)
end