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Option to use z.instanceof(Decimal) for Decimal fields #94

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Option to use z.instanceof(Decimal) for Decimal fields #94

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3 changes: 3 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -127,7 +127,9 @@ model User {
| `output` | Output directory for the generated zod schemas | `string` | `./generated` |
| `isGenerateSelect` | Enables the generation of Select related schemas and the select property | `boolean` | `false` |
| `isGenerateInclude` | Enables the generation of Include related schemas and the include property | `boolean` | `false` |
| `useDecimalLib` | Treat Decimal values as instances of Decimal library instead of numbers | `boolean` | `false` |

|
Use additional options in the `schema.prisma`

```prisma
Expand All @@ -136,5 +138,6 @@ generator zod {
output = "./generated-zod-schemas"
isGenerateSelect = true
isGenerateInclude = true
useDecimalLib = true
}
```
13 changes: 13 additions & 0 deletions package-lock.json
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1 change: 1 addition & 0 deletions package.json
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Expand Up @@ -35,6 +35,7 @@
"devDependencies": {
"@types/node": "^18.11.18",
"@types/prettier": "^2.7.2",
"decimal.js": "^10.4.3",
"prisma": "^4.8.0",
"ts-node": "^10.9.1",
"typescript": "^4.9.4"
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12 changes: 7 additions & 5 deletions prisma/schema.prisma
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Expand Up @@ -12,14 +12,16 @@ generator zod {
output = "./generated"
isGenerateSelect = true
isGenerateInclude = true
useDecimalLib = true
}

model User {
id Int @id @default(autoincrement())
email String @unique
name String?
posts Post[]
books Book[]
id Int @id @default(autoincrement())
email String @unique
name String?
posts Post[]
books Book[]
rating Decimal
}

model Post {
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3 changes: 3 additions & 0 deletions src/helpers/helpers.ts
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Expand Up @@ -10,6 +10,7 @@ import { changeOptionalToRequiredFields } from './whereUniqueInput-helpers';
interface AddMissingInputObjectTypeOptions {
isGenerateSelect: boolean;
isGenerateInclude: boolean;
useDecimalLib: boolean;
}

export function addMissingInputObjectTypes(
Expand Down Expand Up @@ -53,6 +54,7 @@ export function addMissingInputObjectTypes(
);
Transformer.setIsGenerateInclude(true);
}
Transformer.setUseDecimalLib(options.useDecimalLib);

changeOptionalToRequiredFields(inputObjectTypes);
}
Expand All @@ -63,5 +65,6 @@ export function resolveAddMissingInputObjectTypeOptions(
return {
isGenerateSelect: generatorConfigOptions.isGenerateSelect === 'true',
isGenerateInclude: generatorConfigOptions.isGenerateInclude === 'true',
useDecimalLib: generatorConfigOptions.useDecimalLib === 'true',
};
}
12 changes: 12 additions & 0 deletions src/transformer.ts
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Expand Up @@ -32,6 +32,7 @@ export default class Transformer {
private static isCustomPrismaClientOutputPath: boolean = false;
private static isGenerateSelect: boolean = false;
private static isGenerateInclude: boolean = false;
private static useDecimalLib: boolean = false;

constructor(params: TransformerParams) {
this.name = params.name ?? '';
Expand All @@ -54,6 +55,10 @@ export default class Transformer {
this.isGenerateInclude = isGenerateInclude;
}

static setUseDecimalLib(useDecimalLib: boolean) {
this.useDecimalLib = useDecimalLib;
}

static getOutputPath() {
return this.outputPath;
}
Expand Down Expand Up @@ -133,6 +138,11 @@ export default class Transformer {
let alternatives = lines.reduce<string[]>((result, inputType) => {
if (inputType.type === 'String') {
result.push(this.wrapWithZodValidators('z.string()', field, inputType));
} else if (Transformer.useDecimalLib && inputType.type === 'Decimal') {
result.push(
this.wrapWithZodValidators('z.instanceof(Decimal)', field, inputType),
);
this.addSchemaImport('Decimal');
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This might be a questionable decision, but I couldn't find any better way to add an import { Decimal } from 'decimal.js' for all schemas with Decimal fields

} else if (
inputType.type === 'Int' ||
inputType.type === 'Float' ||
Expand Down Expand Up @@ -372,6 +382,8 @@ export default class Transformer {
)} } from '../${queryName}${modelName}.schema'`;
} else if (Transformer.enumNames.includes(name)) {
return `import { ${name}Schema } from '../enums/${name}.schema'`;
} else if (name === 'Decimal') {
return "import { Decimal } from 'decimal.js'";
} else {
return `import { ${name}ObjectSchema } from './${name}.schema'`;
}
Expand Down