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【Rails】SQLでTableを指定してJoinをする

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多段ネストしている状態でWhere句を実施した場合
データを引っ張るテーブルの指定制御がずれる可能性がある。

ずれた場合は下記にてTableを指定すること
.where(issues: {project_id: project_id})

joinやincludeで書く方法もあるらしい

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