Moritz
8400e727a7
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Complete refactoring of resources, database tables, code references, tests, and documentation for improved naming consistency.
83 lines
2.2 KiB
Elixir
83 lines
2.2 KiB
Elixir
defmodule Mv.Membership.CustomFieldValue do
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@moduledoc """
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Ash resource representing a custom field value for a member.
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## Overview
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CustomFieldValues implement the Entity-Attribute-Value (EAV) pattern, allowing
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dynamic custom fields to be attached to members. Each custom field value links a
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member to a custom field and stores the actual value.
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## Value Storage
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Values are stored using Ash's union type with JSONB storage format:
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```json
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{
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"type": "string",
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"value": "example"
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}
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```
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## Supported Types
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- `:string` - Text data
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- `:integer` - Numeric data
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- `:boolean` - True/false flags
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- `:date` - Date values
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- `:email` - Validated email addresses (custom type)
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## Relationships
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- `belongs_to :member` - The member this custom field value belongs to (CASCADE delete)
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- `belongs_to :custom_field` - The custom field definition
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## Constraints
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- Each member can have only one custom field value per custom field (unique composite index)
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- Custom field values are deleted when the associated member is deleted (CASCADE)
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"""
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use Ash.Resource,
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domain: Mv.Membership,
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data_layer: AshPostgres.DataLayer
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postgres do
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table "custom_field_values"
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repo Mv.Repo
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references do
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reference :member, on_delete: :delete
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end
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end
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actions do
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defaults [:create, :read, :update, :destroy]
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default_accept [:value, :member_id, :custom_field_id]
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end
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attributes do
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uuid_primary_key :id
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attribute :value, :union,
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constraints: [
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storage: :type_and_value,
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types: [
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boolean: [type: :boolean],
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date: [type: :date],
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integer: [type: :integer],
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string: [type: :string],
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email: [type: Mv.Membership.Email]
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]
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]
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end
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relationships do
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belongs_to :member, Mv.Membership.Member
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belongs_to :custom_field, Mv.Membership.CustomField
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end
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calculations do
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calculate :value_to_string, :string, expr(value[:value] <> "")
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end
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# Ensure a member can only have one custom field value per custom field
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# For example: A member can have only one "phone" custom field value, one "email" custom field value, etc.
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identities do
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identity :unique_custom_field_per_member, [:member_id, :custom_field_id]
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end
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end
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