Nested Set

Add nested set field to You keystone project

Nested Set Model

https://en.wikipedia.org/wiki/Nested_set_model In database fields: left, rigth, depth

Graphql Scheme

Output

• left: Int
• right: Int
• depth: Int
• weight: Int // Serial number through current branch
• parentId: ID// Keystone id of direct parent element
• isLeaf: Boolean, true if have no children
• childrenCount // counts children

Filters

• parentId: type ID // Keystone id of direct parent element
• childOf // filters all elements that are children of that Keystone id
• parentOf // filters all elements that are parent of that Keystone id
• prevSiblingOf: ID! // left sibling element, null if absent
• nextSiblingOf: ID! // right sibling element, null if absent

Mutation

Create and Update

• parentId: ID // Keystone id of direct parent element
• prevSiblingId: ID // Keystone id of left sibling element
• nextSiblingId: ID // Keystone id of right sibling element

Delete

If node has children they move to the parent of deleted node