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feat(decorator): add compute support (#23)
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@@ -20,9 +20,3 @@ PreCommit: | |
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| BundleAudit: | ||
| enabled: true | ||
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| PrePush: | ||
| RSpec: | ||
| enabled: true | ||
| command: ["run_rspec"] | ||
| quiet: false | ||
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115 changes: 115 additions & 0 deletions
115
...ib/forest_admin_datasource_customizer/decorators/computed/compute_collection_decorator.rb
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,115 @@ | ||
| module ForestAdminDatasourceCustomizer | ||
| module Decorators | ||
| module Computed | ||
| class ComputeCollectionDecorator < ForestAdminDatasourceToolkit::Decorators::CollectionDecorator | ||
| include ForestAdminDatasourceToolkit::Components::Query | ||
| include ForestAdminDatasourceToolkit::Validations | ||
| include ForestAdminDatasourceCustomizer::Decorators::Computed::Utils | ||
| include ForestAdminDatasourceToolkit::Exceptions | ||
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| def initialize(child_collection, datasource) | ||
| super | ||
| @computeds = {} | ||
| end | ||
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| def get_computed(path) | ||
| index = path.index(':') | ||
| return @computeds[path] if index.nil? | ||
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| foreign_collection = schema[:fields][path[0, index]].foreign_collection | ||
| association = @datasource.get_collection(foreign_collection) | ||
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| association.get_computed(path[index + 1, path.length - index - 1]) | ||
| end | ||
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| def register_computed(name, computed) | ||
| FieldValidator.validate_name(@name, name) | ||
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| # Check that all dependencies exist and are columns | ||
| computed.dependencies.each do |field| | ||
| FieldValidator.validate(self, field) | ||
| end | ||
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| if computed.dependencies.length <= 0 | ||
| raise ForestException, | ||
| "Computed field '#{name}' must have at least one dependency." | ||
| end | ||
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| @computeds[name] = computed | ||
| mark_schema_as_dirty | ||
| end | ||
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| def list(caller, filter, projection) | ||
| child_projection = projection.replace { |path| rewrite_field(self, path) } | ||
| records = @child_collection.list(caller, filter, child_projection) | ||
| return records if child_projection.equals(projection) | ||
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| context = ForestAdminDatasourceCustomizer::Context::CollectionCustomizationContext.new(self, caller) | ||
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| ComputedField.compute_from_records(context, self, child_projection, projection, records) | ||
| end | ||
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| def aggregate(caller, filter, aggregation, limit = nil) | ||
| # No computed are used in the aggregation => just delegate to the underlying collection. | ||
| unless aggregation.projection.any? do |field| | ||
| get_computed(field) | ||
| end | ||
| return @child_collection.aggregate(caller, filter, aggregation, | ||
| limit) | ||
| end | ||
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| # Fallback to full emulation. | ||
| aggregation.apply( | ||
| list(caller, filter, aggregation.projection), | ||
| caller.timezone, | ||
| limit | ||
| ) | ||
| end | ||
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| def refine_schema(child_schema) | ||
| schema = child_schema.clone | ||
| schema[:fields] = child_schema[:fields].clone | ||
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| @computeds.each do |name, computed| | ||
| schema[:fields][name] = ForestAdminDatasourceToolkit::Schema::ColumnSchema.new( | ||
| column_type: computed.column_type, | ||
| default_value: computed.default_value, | ||
| enum_values: computed.enum_values || [], | ||
| filter_operators: [], | ||
| is_primary_key: false, | ||
| is_read_only: true, | ||
| is_sortable: false | ||
| ) | ||
| end | ||
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| schema | ||
| end | ||
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| def rewrite_field(collection, path) | ||
| # Projection is targeting a field on another collection => recurse. | ||
| if path.include?(':') | ||
| prefix = path.split(':')[0] | ||
| schema = collection.schema[:fields][prefix] | ||
| association = collection.datasource.get_collection(schema.foreign_collection) | ||
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| return Projection.new([path]) | ||
| .unnest | ||
| .replace { |sub_path| rewrite_field(association, sub_path) } | ||
| .nest(prefix: prefix) | ||
| end | ||
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| # Computed field that we own: recursively replace by dependencies | ||
| computed = collection.get_computed(path) | ||
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| if computed | ||
| Projection.new(computed.dependencies.flatten).replace do |dep_path| | ||
| rewrite_field(collection, dep_path) | ||
| end | ||
| else | ||
| Projection.new([path]) | ||
| end | ||
| end | ||
| end | ||
| end | ||
| end | ||
| end |
21 changes: 21 additions & 0 deletions
21
...tomizer/lib/forest_admin_datasource_customizer/decorators/computed/computed_definition.rb
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,21 @@ | ||
| module ForestAdminDatasourceCustomizer | ||
| module Decorators | ||
| module Computed | ||
| class ComputedDefinition | ||
| attr_reader :column_type, :dependencies, :default_value, :enum_values | ||
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| def initialize(column_type:, dependencies:, values:, default_value: nil, enum_values: nil) | ||
| @column_type = column_type | ||
| @dependencies = dependencies | ||
| @values = values | ||
| @default_value = default_value | ||
| @enum_values = enum_values | ||
| end | ||
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| def get_values(*args) | ||
| @values.call(*args) | ||
| end | ||
| end | ||
| end | ||
| end | ||
| end |
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