在域对象约束中指定grails浮点精度，怎么办？

Question

I how do I say a field is of the following type and precision in grails constraint?

FLOAT(7,4)

In mysql it means it will have value of something like xxx.yyyy , 3 decimal places to the left of dot and four decimal places to the right of the dot.

Answer 1

Set the max and scale constraints of your domain class property to influence the schema generation. The Grails documentation explains this in detail.

From the documentation:

 someFloatValue max: 1000000, scale: 3 

would yield:

 someFloatValue DECIMAL(19, 3) // precision is default 

Note The above is directly from the Grails documentation but logically it should yield DECIMAL(9, 3) .