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用户在使用 Prisma 定义数据模型时，希望为 ID 字段设置一个以特定前缀开头的动态默认值（如 `user` 后接 JavaScript 表达式结果），但 Prisma 的 `@default` 指令不支持 JavaScript 函数或字符串插值。这导致用户无法在模型层直接实现自定义 ID 生成逻辑，被迫在应用代码中手动处理 ID 赋值，增加了代码复杂性和出错风险。由于该问题没有获得任何回答，且提问者未接受答案，说明 Prisma 官方文档和社区尚未提供清晰的解决方案，用户可能需要在多个方案间反复尝试，造成时间浪费和开发效率下降。

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Stack Overflow question

in my data model, as the type of id, I want to generate a default value that will start with the user. so the id will bed something like this user..rear33422qeqr type User { myId: String! @default (`user${2+2}`) name: String! email: String! @unique } is it possible to call a javascript function or using string interpolation ( user${2+2} )

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Question details

View count: 1,142
Answer count: 0
Last activity: 2026/05/28

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name: Prisma: Is there any way to execute javascript as default value of prisma data type?
tagline: javascript, graphql, graphql-js, prisma, prisma-graphql
description: in my data model, as the type of id, I want to generate a default value that will start with the user. so the id will bed something like this user..rear33422qeqr type User { myId: String! @default (`user${2+2}`) name: String! email: String! @unique } is it possible to call a javascript function or using string interpolation ( user${2+2} )
votes_count: 5
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created_at_on_source: 2020-05-04T04:31:19.000Z
source_url: https://stackoverflow.com/questions/61585219/prisma-is-there-any-way-to-execute-javascript-as-default-value-of-prisma-data-t

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javascriptgraphqlgraphql-jsprismaprisma-graphql

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