GraphQL：添加计算字段时出错

编程问答 2022-06-09

问题描述

我正在尝试使用hasura API将计算字段添加到架构“ abc”中的graphql表“ user”中，但收到以下错误：

Saving computed field Failed
in table "abc.user": in computed field "full_name": the computed field "full_name" 
cannot be added to table "abc.user" because the function "abc.fullname" is 
of type VOLATILE; cannot be added as a computed field

该功能已正确添加：

    CREATE OR REPLACE FUNCTION abc.fullname(userrow abc.user)
    RETURNS TEXT AS $$
BEGIN
    SELECT userrow.first_name || ' ' || userrow.last_name;
END;
$$ LANGUAGE plpgsql;

我能够从下拉列表中选择函数“全名”，但是在添加计算字段时出现错误。任何指导表示赞赏。谢谢。

enter image description here

解决方法

该错误消息试图告诉您。您需要将函数显式声明为Size of X is 3 Size of Y is 5 Goes into X[0] -> Fill that element with the 5 inputs 0 * y[0],then 0 * y[1]... etc Goes to X[1] -> Fills it with the 5 inputs of 1 * Y[0],then 1 * Y[1] .. goes into X[2] -> same thing as before ，以便可以在计算列的定义中使用它：

immutable
computed-fieldgraphqlgraphqlhasurapostgresqlpsql