子流程的输入参数怎么传进去？

discuz

这是个Node-RED的问题，不知是发在本讨论区还是应该发在疑问讨论区，如果发错地方了，请版主移到其他版块。谢谢！


简化问题模型：我建了一个子流程，设置了三个入口参数a、b、c，这里似乎只能是环境变量。

[{"id":"6b4c9ba4.deb134","type":"subflow","name":"abc","info":"","category":"","in":[{"x":80,"y":80,"wires":[{"id":"9eff8f77.86c6c"}]}],"out":[{"x":300,"y":80,"wires":[{"id":"9eff8f77.86c6c","port":0}]}],"env":[{"name":"a","type":"str","value":""},{"name":"b","type":"str","value":""},{"name":"c","type":"str","value":""}],"color":"#DDAA99"},{"id":"9eff8f77.86c6c","type":"function","z":"6b4c9ba4.deb134","name":"","func":"// use a, b, c\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":200,"y":80,"wires":[[]]}]

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使用这子流程，在前面添加一个比如function节点，想要设置好abc的参数，该怎么写？

[{"id":"6b4c9ba4.deb134","type":"subflow","name":"abc","info":"","category":"","in":[{"x":80,"y":80,"wires":[{"id":"9eff8f77.86c6c"}]}],"out":[{"x":300,"y":80,"wires":[{"id":"9eff8f77.86c6c","port":0}]}],"env":[{"name":"a","type":"str","value":""},{"name":"b","type":"str","value":""},{"name":"c","type":"str","value":""}],"color":"#DDAA99"},{"id":"9eff8f77.86c6c","type":"function","z":"6b4c9ba4.deb134","name":"","func":"// use a, b, c\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":200,"y":80,"wires":[[]]},{"id":"1c05f6a2.f4ef79","type":"tab","label":"use","disabled":false,"info":""},{"id":"b6e78133.51754","type":"subflow:6b4c9ba4.deb134","z":"1c05f6a2.f4ef79","name":"abc","env":[],"x":470,"y":60,"wires":[[]]},{"id":"63c4d8fc.e559f8","type":"function","z":"1c05f6a2.f4ef79","name":"如何设置后面节点所需的abc参数","func":"//这里如何设置后面节点所需的abc参数？\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":220,"y":60,"wires":[["b6e78133.51754"]]}]

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我试了下环境变量、flow变量等都不行。请大神们指点下，这里如何将变量传给a、b、c。

evantalk

顶一下，我也想知道这个问题

neroxps

var a= env.get(“a”)
https://nodered.org/docs/user-guide/environment-variables

discuz

感谢大神指导，不过这个似乎只能在子流程中获得数据，在子流程之前好像获得不了它的值。

function节点设置ab的值

直接设置subflow节点中c的值




这是subflow子流程中获得abc的值合并到msg中


打印出来，a和b的值没有设置上，不知道是不是哪里弄错了

neroxps

discuz 发表于 2020-12-31 10:47
感谢大神指导，不过这个似乎只能在子流程中获得数据，在子流程之前好像获得不了它的值。

function节点设置 ...

之前肯定不行。

pikaq

通过msg传递，需要啥就设置啥属性

discuz

pikaq 发表于 2020-12-31 12:03
通过msg传递，需要啥就设置啥属性

前面节点设置msg.xxx，subflow变量名设置为msg.xxx，两个不是一样的东西，传不进去。

你说的msg具体怎么操作？

seon

子流程只能设置静态的值，无法设置动态的值，如果需要有动态的值，可以通过msg传递，或者存到flow里，在子流程里面通过$flowContext('$parent.logModule')这样的方式获取

seon

discuz 发表于 2020-12-31 16:36
前面节点设置msg.xxx，subflow变量名设置为msg.xxx，两个不是一样的东西，传不进去。

你说的msg具体怎么 ...

在子流程外面，设置msg.xx，在子流程里面直接读取msg.xx就行了

discuz

seon 发表于 2021-1-7 23:43
在子流程外面，设置msg.xx，在子流程里面直接读取msg.xx就行了

我需要的是动态的，能在子流程的节点上设置的值，如上图的a、b、c等的值，不是流程外面传来的值