在哪里更改Active Model YAML表示形式的格式？

Question

我正在使用YAML::dump（或多或少）来跟踪git存储库中对数据库的更改的简单方法。实际上，这意味着我将数据库的某些部分“转储”到一组YAML文件中，提交它们，然后可以非常轻松地跟踪它们。总的来说，这很好，我对整个过程感到满意。

唯一的问题是嵌入的JSON文档。这些存储的数据方面在关系模型中根本无法很好地完成，有时非常复杂。 YAML::dump将它们序列化为单行字符串（从存储角度看，这似乎是最佳选择），但对进行区分很可怕。以下示例显示了我当前的输出：

--- !ruby/object:Grammar
concise_attributes:
- !ruby/object:ActiveModel::Attribute::FromDatabase
  name: name
  value_before_type_cast: Dynamisches XML
- !ruby/object:ActiveModel::Attribute::FromDatabase
  name: slug
  value_before_type_cast: dxml
- !ruby/object:ActiveModel::Attribute::FromDatabase
  name: id
  value_before_type_cast: 7e333dff-6d1c-4042-aaa5-0cdf2cfeed7e
- !ruby/object:ActiveModel::Attribute::FromDatabase
  name: model
  value_before_type_cast: '{"root": "element", "types": {"if": {"type": "concrete",
    "attributes": [{"name": "condition", "type": "allowed", "nodeTypes": ["expr"]},
    {"name": "body", "type": "allowed", "nodeTypes": [{"occurs": "*", "nodeType":
    "element"}, {"occurs": "*", "nodeType": "text"}, {"occurs": "*", "nodeType": "interpolate"},
    {"occurs": "*", "nodeType": "if"}]}]}, "expr": {"type": "oneOf", "oneOf": ["exprVar",
    "exprConst", "exprBinary"]}, "text": {"type": "concrete", "attributes": [{"base":
    "string", "name": "value", "type": "property"}]}, "element": {"type": "concrete",
    "attributes": [{"name": "tag-open-begin", "type": "terminal", "symbol": "<"},
    {"base": "string", "name": "name", "type": "property"}, {"name": "attributes",
    "type": "allowed", "nodeTypes": [{"occurs": "*", "nodeType": "attribute"}]}, {"name":
    "tag-open-end", "type": "terminal", "symbol": ">"}, {"name": "elements", "type":
    "allowed", "nodeTypes": [{"occurs": "*", "nodeType": "element"}, {"occurs": "*",
    "nodeType": "text"}, {"occurs": "*", "nodeType": "interpolate"}, {"occurs": "*",
    "nodeType": "if"}]}, {"name": "tag-close", "type": "terminal", "symbol": "<ende/>"}]},
    "exprVar": {"type": "concrete", "attributes": [{"base": "string", "name": "name",
    "type": "property"}]}, "attribute": {"type": "concrete", "attributes": [{"base":
    "string", "name": "name", "type": "property"}, {"name": "equals", "type": "terminal",
    "symbol": "="}, {"name": "quot-begin", "type": "terminal", "symbol": "\""}, {"name":
    "value", "type": "allowed", "nodeTypes": [{"occurs": "*", "nodeType": "text"},
    {"occurs": "*", "nodeType": "interpolate"}]}, {"name": "quot-end", "type": "terminal",
    "symbol": "\""}]}, "exprConst": {"type": "concrete", "attributes": [{"base": "string",
    "name": "name", "type": "property"}]}, "exprBinary": {"type": "concrete", "attributes":
    [{"name": "lhs", "type": "allowed", "nodeTypes": ["expr"]}, {"name": "operator",
    "type": "allowed", "nodeTypes": ["binaryOperator"]}, {"name": "rhs", "type": "allowed",
    "nodeTypes": ["expr"]}]}, "interpolate": {"type": "concrete", "attributes": [{"name":
    "expr", "type": "allowed", "nodeTypes": ["expr"]}]}, "binaryOperator": {"type":
    "concrete", "attributes": [{"base": "string", "name": "operator", "type": "property"}]}}}'
- !ruby/object:ActiveModel::Attribute::FromDatabase
  name: created_at
  value_before_type_cast: '2018-05-15 18:48:12.004676'
- !ruby/object:ActiveModel::Attribute::FromDatabase
  name: updated_at
  value_before_type_cast: '2018-12-20 15:39:19.237639'
- !ruby/object:ActiveModel::Attribute::FromDatabase
  name: programming_language_id
  value_before_type_cast: dxml-eruby
- !ruby/object:ActiveModel::Attribute::FromDatabase
  name: technical_name
  value_before_type_cast: dxml
new_record: false
active_record_yaml_version: 2

“典型”差异（即使只有很小的变化），看起来像这样：

因此，我宁愿存储model属性的格式正确的字符串表示形式。

我怀疑幕后某个地方正在发生“铁轨魔术”。我确实希望有一个API可以影响格式。但是，到目前为止，以下事情对我来说还行不通：

• 在模型类上定义一个匹配的*_before_type_cast方法。 YAML::dump不会调用此方法。
• 在模型类上定义to_yaml。也不调用此方法。
• 我发现了有关ActiveModel::AttributeSet::YAMLEncoder的信息，但不知道应如何/在何处使用它。或就此而言：YAML::dump最终以某种方式使用了它。它似乎是我所看到的一般格式的原因。