Workflow.map()
.map() 方法将前一步骤的输出数据映射到后续步骤的输入,从而允许你在步骤之间转换数据。
🌐 The .map() method maps output data from a previous step to the input of a subsequent step, allowing you to transform data between steps.
使用示例Direct link to 使用示例
🌐 Usage example
workflow.map(async ({ inputData }) => `${inputData.value} - map`
参数Direct link to 参数
🌐 Parameters
mappingFunction:
返回Direct link to 返回
🌐 Returns
workflow:
使用 inputDataDirect link to using-inputdata
🌐 Using inputData
使用 inputData 来访问上一步的完整输出。
🌐 Use inputData to access the full output of the previous step.
.then(step1)
.map(({ inputData }) => {
console.log(inputData);
})
使用 getStepResult()Direct link to using-getstepresult
🌐 Using getStepResult()
使用 getStepResult() 通过引用步骤的实例来访问特定步骤的完整输出。
🌐 Use getStepResult() to access the full output of a specific step by referencing the step's instance.
.then(step1)
.map(async ({ getStepResult }) => {
console.log(getStepResult(step1));
})
使用 getInitData()Direct link to using-getinitdata
🌐 Using getInitData()
使用 getInitData<typeof workflow>() 来访问提供给工作流的初始输入数据。
.then(step1)
.map(async ({ getInitData }) => {
console.log(getInitData());
})
使用 mapVariable()Direct link to using-mapvariable
🌐 Using mapVariable()
.map() 的对象形式提供了一种用于映射字段的替代声明性语法。你无需编写函数,而是定义一个对象,其中每个键都是新的字段名,每个值使用 mapVariable() 从前面的步骤或工作流输入中提取数据。
从 workflows 模块中导入 mapVariable():
🌐 The object form of .map() provides an alternative declarative syntax for mapping fields. Instead of writing a function, you define an object where each key is a new field name and each value uses mapVariable() to extract data from previous steps or workflow input.
Import mapVariable() from the workflows module:
import { mapVariable } from "@mastra/core/workflows";
从步骤输出中提取字段Direct link to 从步骤输出中提取字段
🌐 Extracting fields from step outputs
使用 mapVariable() 和 step 从步骤的输出中提取特定字段,并将其映射到新的字段名称。path 参数指定要提取的字段。
在此示例中,从 step1 的输出中提取 value 字段,并映射到名为 details 的新字段:
🌐 Use mapVariable() with step to extract a specific field from a step's output and map it to a new field name. The path parameter specifies which field to extract.
In this example, the value field from step1's output is extracted and mapped to a new field called details:
.then(step1)
.map({
details: mapVariable({
step: step1,
path: "value"
})
})
从工作流输入中提取字段Direct link to 从工作流输入中提取字段
🌐 Extracting fields from workflow input
使用 mapVariable() 和 initData 从工作流的初始输入数据中提取特定字段。当你需要将原始工作流输入传递给后续步骤时,这非常有用。
在此示例中,从工作流输入中提取 value 字段,并映射到一个名为 details 的字段:
🌐 Use mapVariable() with initData to extract a specific field from the workflow's initial input data. This is useful when you need to pass the original workflow input to a later step.
In this example, the value field from the workflow's input is extracted and mapped to a field called details:
export const testWorkflow = createWorkflow({...});
testWorkflow
.then(step1)
.map({
details: mapVariable({
initData: testWorkflow,
path: "value"
})
})
相关Direct link to 相关
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