如何保存重复记录使用belongsToMany？
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【中文标题】如何保存重复记录使用belongsToMany？【英文标题】：How to save duplicate records use belongsToMany? 【发布时间】：2019-09-05 12:57:03 【问题描述】：我有 2 个模型：模板和模块。两个模型都有关联 belongsToMany 到另一个。现在我想保存几个与模板相关的模块（一个模板可以多次使用模块）。我还在连接表中有额外的字段（位置）。
当我准备好我的实体来保存一切时，一切正常。我在“模块”中得到了重复的记录，但是保存后连接表中只有唯一的记录。
准备好要保存的实体：
AdminTheme\Model\Entity\Template Object
(
[name] => t3
[description] => text3
[modules] => Array
(
[0] => AdminTheme\Model\Entity\Module Object
(
[id] => 2
[name] => TextBox
[default_conf] => Array
(
)
[is_active] => 1
[global_alias] =>
[description] => txt2
[created] => Cake\I18n\FrozenTime Object
(
[time] => 2019-09-05T10:48:04+02:00
[timezone] => Europe/Warsaw
[fixedNowTime] =>
)
[modified] => Cake\I18n\FrozenTime Object
(
[time] => 2019-09-05T14:31:23+02:00
[timezone] => Europe/Warsaw
[fixedNowTime] =>
)
[ico] => format_align_justify
[_joinData] => Cake\ORM\Entity Object
(
[position] => 4
[[new]] => 1
[[accessible]] => Array
(
[*] => 1
)
[[dirty]] => Array
(
[position] => 1
)
[[original]] => Array
(
)
[[virtual]] => Array
(
)
[[hasErrors]] =>
[[errors]] => Array
(
)
[[invalid]] => Array
(
)
[[repository]] => ModulesTemplates
)
[[new]] =>
[[accessible]] => Array
(
[name] => 1
[default_conf] => 1
[is_active] => 1
[global_alias] => 1
[description] => 1
[ico] => 1
[created] => 1
[modified] => 1
[templates] => 1
)
[[dirty]] => Array
(
[_joinData] => 1
)
[[original]] => Array
(
)
[[virtual]] => Array
(
)
[[hasErrors]] =>
[[errors]] => Array
(
)
[[invalid]] => Array
(
)
[[repository]] => AdminTheme.Modules
)
[1] => AdminTheme\Model\Entity\Module Object
(
[id] => 1
[name] => NarrowHeader
[default_conf] => Array
(
[title] => text
)
[is_active] => 1
[global_alias] =>
[description] => txt1
[created] => Cake\I18n\FrozenTime Object
(
[time] => 2019-08-30T08:27:12+02:00
[timezone] => Europe/Warsaw
[fixedNowTime] =>
)
[modified] => Cake\I18n\FrozenTime Object
(
[time] => 2019-09-05T14:31:23+02:00
[timezone] => Europe/Warsaw
[fixedNowTime] =>
)
[ico] => format_align_justify
[_joinData] => Cake\ORM\Entity Object
(
[position] => 6
[[new]] => 1
[[accessible]] => Array
(
[*] => 1
)
[[dirty]] => Array
(
[position] => 1
)
[[original]] => Array
(
)
[[virtual]] => Array
(
)
[[hasErrors]] =>
[[errors]] => Array
(
)
[[invalid]] => Array
(
)
[[repository]] => ModulesTemplates
)
[[new]] =>
[[accessible]] => Array
(
[name] => 1
[default_conf] => 1
[is_active] => 1
[global_alias] => 1
[description] => 1
[ico] => 1
[created] => 1
[modified] => 1
[templates] => 1
)
[[dirty]] => Array
(
[_joinData] => 1
)
[[original]] => Array
(
[_joinData] => Cake\ORM\Entity Object
(
[position] => 5
[[new]] => 1
[[accessible]] => Array
(
[*] => 1
)
[[dirty]] => Array
(
[position] => 1
)
[[original]] => Array
(
)
[[virtual]] => Array
(
)
[[hasErrors]] =>
[[errors]] => Array
(
)
[[invalid]] => Array
(
)
[[repository]] => ModulesTemplates
)
)
[[virtual]] => Array
(
)
[[hasErrors]] =>
[[errors]] => Array
(
)
[[invalid]] => Array
(
)
[[repository]] => AdminTheme.Modules
)
[2] => AdminTheme\Model\Entity\Module Object
(
[id] => 1
[name] => NarrowHeader
[default_conf] => Array
(
[title] => text
)
[is_active] => 1
[global_alias] =>
[description] => txt1
[created] => Cake\I18n\FrozenTime Object
(
[time] => 2019-08-30T08:27:12+02:00
[timezone] => Europe/Warsaw
[fixedNowTime] =>
)
[modified] => Cake\I18n\FrozenTime Object
(
[time] => 2019-09-05T14:31:23+02:00
[timezone] => Europe/Warsaw
[fixedNowTime] =>
)
[ico] => format_align_justify
[_joinData] => Cake\ORM\Entity Object
(
[position] => 6
[[new]] => 1
[[accessible]] => Array
(
[*] => 1
)
[[dirty]] => Array
(
[position] => 1
)
[[original]] => Array
(
)
[[virtual]] => Array
(
)
[[hasErrors]] =>
[[errors]] => Array
(
)
[[invalid]] => Array
(
)
[[repository]] => ModulesTemplates
)
[[new]] =>
[[accessible]] => Array
(
[name] => 1
[default_conf] => 1
[is_active] => 1
[global_alias] => 1
[description] => 1
[ico] => 1
[created] => 1
[modified] => 1
[templates] => 1
)
[[dirty]] => Array
(
[_joinData] => 1
)
[[original]] => Array
(
[_joinData] => Cake\ORM\Entity Object
(
[position] => 5
[[new]] => 1
[[accessible]] => Array
(
[*] => 1
)
[[dirty]] => Array
(
[position] => 1
)
[[original]] => Array
(
)
[[virtual]] => Array
(
)
[[hasErrors]] =>
[[errors]] => Array
(
)
[[invalid]] => Array
(
)
[[repository]] => ModulesTemplates
)
)
[[virtual]] => Array
(
)
[[hasErrors]] =>
[[errors]] => Array
(
)
[[invalid]] => Array
(
)
[[repository]] => AdminTheme.Modules
)
)
[user_id] => 3
[amount_modules] => 3
[[new]] => 1
[[accessible]] => Array
(
[name] => 1
[user_id] => 1
[description] => 1
[use_amount] => 1
[created] => 1
[modified] => 1
[user] => 1
[amount_modules] => 1
[modules] => 1
)
[[dirty]] => Array
(
[name] => 1
[description] => 1
[modules] => 1
[user_id] => 1
[amount_modules] => 1
)
)
尽管上面的实体有 3 个项目，但保存后我在连接表中只有 2 条记录。
【问题讨论】：
在您创建和保存实体的位置发布代码。 【参考方案1】：您应该注意在 cakephp 中保存或关联保存具有 id 的实体或数据，它不会保存但会更新。因此，对于您的数据，有两个具有相同 id 的对象，在这种情况下，它将插入第一个对象，并且当第一个对象遇到相同的对象 id 时，它将被更新。
所以您的记录总共只有 2 行。
【讨论】：
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