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用户在使用 Prisma 定义数据模型时，希望为 ID 字段设置一个以固定前缀（如“user”）开头、后接动态生成字符串的默认值，例如通过 JavaScript 表达式或函数生成。但 Prisma 的 @default 指令目前不支持执行 JavaScript 代码或字符串插值，用户只能使用静态字符串或内置函数。这导致用户无法在模型层直接实现自定义 ID 生成逻辑，被迫在应用层手动处理，增加了代码复杂性和维护成本，且可能破坏数据一致性。

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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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