newglossaryentry: howto fill key with other keys for a subglossentry

Question

In a use-case more complex then the MWE I want to generate the symbol key of a glossary entry based on other keys (e.g. name & description). In the use-case the symbol a will be a math expression compossed of other custom keys b & c which are math expressions and need to be combined e.g. a:= b^c.

My approach in the MWE does work out for a first level entry, but fails for the second level entries. Please see the MWE output table column "Remarks" below for what I expect. I observed that the generated Symbol is allways that of the last defined child newglossaryentryin the script.

I would appreciate some help and suggestions for improvement.

\documentclass{article}
\usepackage[T1]{fontenc}

\usepackage{longtable}
\usepackage{booktabs}

\usepackage[nomain,nonumberlist]{glossaries}           

\newglossary[sog]{symbol}{soi}{soo}{Symbols}

\newglossarystyle{groupedsymbols}{%  
    \renewenvironment{theglossary}%  
    {\begin{longtable}{llp{\glsdescwidth}}}%  
        {\bottomrule % booktabs
        \end{longtable}}%  
    \renewcommand*{\glossaryheader}{%
        \toprule % booktabs 
        \bfseries Category & %
        \bfseries Symbol & %
        \bfseries Remark %
        \\\endhead
        \midrule % booktabs
    }%  
    \renewcommand*{\glsgroupheading}[1]{}% 
    %    
    \renewcommand*{\glossentry}[2]{%
        %\glsentryitem{##1} %
        \bfseries \glsentrydesc{##1} & & %
        \\
    }% 
    \renewcommand*{\subglossentry}[3]{%  
         & \glsentrysymbol{##2} & \glsentrydesc{##2} %
        \\
    }% 
    \renewcommand*{\glsgroupskip}{\relax}
}

\makeglossaries

\newglossaryentry{group}{%
    type=symbol,
    name={testgroup},
    description={Categ. 1}
}

\newglossaryentry{groupentrytwo}{%
    type=symbol,
    parent=group,
    name={yabc},  
    description={Symbol WRONG ! should be: yabc},
    symbol={\glsentryname{\glslabel}}
} 

\newglossaryentry{groupentryone}{%
    type=symbol,
    parent=group,
    name={zabc},  
    description={Symbol is zabc correctly},
    symbol={\glsentryname{\glslabel}}
} 

\begin{document}
    \glsaddall[types={symbol}]
    \printglossary[type=symbol,style=groupedsymbols]
\end{document}

Answer 1

I believe Christian Hupfer had the solution to your problem. But if indeed it isn't what you were looking for perhaps you could clarify further. I have expanded your MWE with the solution described above and I get the results that I infer to be expected. Perhaps a more complex MWE is needed

\documentclass{article}
\usepackage[T1]{fontenc}

\usepackage{longtable}
\usepackage{booktabs}

\usepackage[nomain,nonumberlist]{glossaries}           

\newglossary[sog]{symbol}{soi}{soo}{Symbols}

\newglossarystyle{groupedsymbols}{%  
    \renewenvironment{theglossary}%  
    {\begin{longtable}{llp{\glsdescwidth}}}%  
        {\bottomrule % booktabs
        \end{longtable}}%  
    \renewcommand*{\glossaryheader}{%
        \toprule % booktabs 
        \bfseries Category & %
        \bfseries Symbol & %
        \bfseries Remark %
        \\\endhead
        \midrule % booktabs
    }%  
    \renewcommand*{\glsgroupheading}[1]{}% 
    %    
    \renewcommand*{\glossentry}[2]{%
        %\glsentryitem{##1} %
        \bfseries \glsentrydesc{##1} & & %
        \\
    }% 
    \renewcommand*{\subglossentry}[3]{%  
         & \glsentrytext{##2} & \glsentrydesc{##2} %
        \\
    }% 
    \renewcommand*{\glsgroupskip}{\relax}
}

\makeglossaries

\newglossaryentry{group}{%
    type=symbol,
    name={testgroup},
    description={Categ. 1}
}

\newglossaryentry{quadratic}{%
    type=symbol,
    name={testgrouptwo},
    description={quadratic formulas}
}

\newglossaryentry{groupentrytwo}{%
    type=symbol,
    parent=group,
    name={yabc},  
    description={Symbol WRONG ! should be: yabc  Not anymore.  This is what I expected.},
    symbol={\glsentryname{\glslabel}}
} 

\newglossaryentry{groupentryone}{%
    type=symbol,
    parent=group,
    name={zabc},  
    description={Symbol is zabc correctly as expected},
    symbol={\glsentryname{\glslabel}}
} 

\newglossaryentry{grouptwoentrytwo}{%
    type=symbol,
    parent=quadratic,
    name={$ax^2 + bx + c = 0$},  
    description={This is what I expect},
    symbol={\glsentryname{\glslabel}}
} 

\newglossaryentry{grouptwoentryone}{%
    type=symbol,
    parent=quadratic,
    name={$x = \frac{{ - b \pm \sqrt {b^2 - 4ac} }}{{2a}}$},  
    description={This is what I expect},
    symbol={\glsentryname{\glslabel}}
} 

\begin{document}
    \glsaddall[types={symbol}]
    \printglossary[type=symbol,style=groupedsymbols]
\end{document}