Multi dimensional JSON file to one flat table

[LJR]

I have a multi-dimensional table from a json source that I'm trying to convert into one flat table. I can expand the columns up to a point, and still have tables within rows as in the below: 

The problem I'm having is that when I expand these tables e.g. in the parent column, it opens them up as another seperate table. See example below: 

Is there a way to automatically expand these tables within the original query instead of having each table expand into a new seperate table view? 

[v-yuezhe-msft]

@LJR,

ImkeF has provided a detailed solution about this issue in the similar thread below, please add a custom column in your query following her guide and then expand the custom column.

http://community.powerbi.com/t5/Desktop/Expand-column-where-not-all-records-are-tables/td-p/79060

Regards,
Lydia

[LJR]

Thanks Lydia. I tried this solution but got an error message when trying to apply it:

Expression.Error: We cannot convert a value of type Table to type List.
Details:
Value=Table
Type=Type

[v-yuezhe-msft]

@LJR,

Could you please post the JSON code so that I can  test?

Regards,
Lydia

[LJR · Accepted solution]

Hi Lydia

The end solution that worked was to have the json data coming through via an API "flattened" by our developer to provide a simpler table for analysis. I ended up not working with the issue in Power BI as there was another solution in code.