{
  "define": [
    {
      "desc": "Simple string field with defaults",
      "name": "username",
      "type": "string",
      "options": null,
      "expected_nullable": false,
      "expected_unique": false
    },
    {
      "desc": "Nullable email field",
      "name": "email",
      "type": "string",
      "options": {
        "nullable": true
      },
      "expected_nullable": true,
      "expected_unique": false
    },
    {
      "desc": "Unique username field",
      "name": "username",
      "type": "string",
      "options": {
        "unique": true
      },
      "expected_nullable": false,
      "expected_unique": true
    },
    {
      "desc": "Integer field with default value",
      "name": "age",
      "type": "integer",
      "options": {
        "default": 18
      },
      "expected_nullable": false,
      "expected_unique": false,
      "expected_default": 18
    },
    {
      "desc": "Boolean field with false default",
      "name": "is_active",
      "type": "boolean",
      "options": {
        "default": false
      },
      "expected_nullable": false,
      "expected_unique": false,
      "expected_default": false
    },
    {
      "desc": "Boolean field with true default",
      "name": "is_verified",
      "type": "boolean",
      "options": {
        "default": true
      },
      "expected_nullable": false,
      "expected_unique": false,
      "expected_default": true
    },
    {
      "desc": "Nullable text field",
      "name": "bio",
      "type": "text",
      "options": {
        "nullable": true
      },
      "expected_nullable": true,
      "expected_unique": false
    },
    {
      "desc": "Date field",
      "name": "birthdate",
      "type": "date",
      "options": null,
      "expected_nullable": false,
      "expected_unique": false
    },
    {
      "desc": "DateTime field with nullable",
      "name": "last_login",
      "type": "datetime",
      "options": {
        "nullable": true
      },
      "expected_nullable": true,
      "expected_unique": false
    },
    {
      "desc": "Float field for score",
      "name": "rating",
      "type": "float",
      "options": {
        "default": 0.0
      },
      "expected_nullable": false,
      "expected_unique": false,
      "expected_default": 0.0
    },
    {
      "desc": "JSON field for metadata",
      "name": "metadata",
      "type": "json",
      "options": {
        "nullable": true
      },
      "expected_nullable": true,
      "expected_unique": false
    }
  ],
  "primary_key": [
    {
      "desc": "Standard id primary key",
      "name": "id"
    },
    {
      "desc": "User ID primary key",
      "name": "user_id"
    },
    {
      "desc": "Custom primary key name",
      "name": "uuid"
    },
    {
      "desc": "Table-specific primary key",
      "name": "post_id"
    }
  ],
  "foreign_key": [
    {
      "desc": "User reference",
      "name": "user_id",
      "ref_table": "users",
      "ref_field": "id"
    },
    {
      "desc": "Post reference",
      "name": "post_id",
      "ref_table": "posts",
      "ref_field": "id"
    },
    {
      "desc": "Parent category reference",
      "name": "parent_category_id",
      "ref_table": "categories",
      "ref_field": "id"
    },
    {
      "desc": "Author reference",
      "name": "author_id",
      "ref_table": "users",
      "ref_field": "id"
    },
    {
      "desc": "Organization reference",
      "name": "org_id",
      "ref_table": "organizations",
      "ref_field": "org_id"
    }
  ]
}