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Re-format query

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This commit is contained in:
cryptogopher 2025-01-09 15:58:21 +01:00
parent 23e2f6a062
commit c7f16514d2
1 changed files with 17 additions and 23 deletions
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40
app/models/quantity.rb
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@ -13,38 +13,32 @@ class Quantity < ApplicationRecord
scope :defaults, ->{ where(user: nil) }
scope :ordered, ->{
numbered = Arel::Table.new('numbered')
Quantity.with(numbered: numbered(:parent_id, :name)).with_recursive(
quantities:
[
Arel::SelectManager.new.project(
numbered[Arel.star],
numbered.cast(numbered[:child_number], 'BINARY').as('path'),
Arel::Nodes.build_quoted(0).as('depth')
).from(numbered).where(numbered[:parent_id].eq(nil)),
Arel::SelectManager.new.project(
numbered[Arel.star],
arel_table[:path].concat(numbered[:child_number]),
arel_table[:depth] + 1
).from(numbered).join(arel_table).on(numbered[:parent_id].eq(arel_table[:id]))
]
).select(arel_table[Arel.star]).from(arel_table).order(arel_table[:path])
Quantity.with(numbered: numbered(:parent_id, :name)).with_recursive(quantities: [
Arel::SelectManager.new.project(
numbered[Arel.star],
numbered.cast(numbered[:child_number], 'BINARY').as('path'),
Arel::Nodes.build_quoted(0).as('depth')
).from(numbered).where(numbered[:parent_id].eq(nil)),
Arel::SelectManager.new.project(
numbered[Arel.star],
arel_table[:path].concat(numbered[:child_number]),
arel_table[:depth] + 1
).from(numbered).join(arel_table).on(numbered[:parent_id].eq(arel_table[:id]))
]).select(arel_table[Arel.star]).from(arel_table).order(arel_table[:path])
}
# TODO: extract named functions to custom Arel extension
# https://gist.github.com/ProGM/c6df08da14708dcc28b5ca325df37ceb#extending-arel
scope :numbered, ->(parent_column, order_column){
select(
arel_table[Arel.star],
Arel::Nodes::NamedFunction.new(
'LPAD',
[
Arel::Nodes::NamedFunction.new(
'ROW_NUMBER', []
).over(
Arel::Nodes::Window.new.partition(parent_column).order(order_column)
),
Arel::Nodes::NamedFunction.new('ROW_NUMBER', [])
.over(Arel::Nodes::Window.new.partition(parent_column).order(order_column)),
Arel::SelectManager.new.project(
Arel::Nodes::NamedFunction.new(
'LENGTH', [Arel::Nodes::NamedFunction.new('COUNT', [Arel.star])]
)
Arel::Nodes::NamedFunction.new('LENGTH', [Arel.star.count])])
),
Arel::Nodes.build_quoted('0')
],