實體 - 關係圖錯誤：找不到tikz-er2

Question

運行MikTex和TexStudio並嘗試創建實體關係圖。我不斷收到找不到錯誤tikz-er2。運行Texworks中的代碼時出現同樣的錯誤。代碼生成錯誤的示例如下，但無論示例如何，我都會得到相同的錯誤。 MikTex Package Manager也找不到它。

Answer 1

在這個關於bitbucket的鏈接上，PávelCalado顯示了代碼。您必須將「tikz-er2.sty」複製到與您的代碼相同的文件夾中。 https://bitbucket.org/pavel_calado/tikz-er2/src/da9f9f7f1696?at=default

% The tikz-er2 package. 
% Ver. 1.0 
% (c) Pável Caldo 
% January 2009 

\NeedsTeXFormat{LaTeX2e} 
\ProvidesPackage{tikz-er2}[2009/01/31 Entity-relationship diagrams using the Tikz library] 

\RequirePackage{tikz} 
\RequirePackage[normalem]{ulem} % for the dashed underline 

\usetikzlibrary{shapes.geometric} 
\usetikzlibrary{arrows} 
\usetikzlibrary{fit} 

\tikzstyle{every entity} = [] 
\tikzstyle{every weak entity} = [] 
\tikzstyle{every attribute} = [] 
\tikzstyle{every relationship} = [] 
\tikzstyle{every link} = [] 
\tikzstyle{every isa} = [] 

\tikzstyle{link} = [>=triangle 60, draw, thick, every link] 

\tikzstyle{total} = [link, double, double distance=3pt] 

\tikzstyle{entity} = [rectangle, draw, black, very thick, 
        minimum width=6em, minimum height=3em, 
        every entity] 

\tikzstyle{weak entity} = [entity, double, double distance=2pt, 
         every weak entity] 

\tikzstyle{attribute} = [ellipse, draw, black, very thick, 
        minimum width=5em, minimum height=2em, 
        every attribute] 

%\tikzstyle{key attribute} = [attribute, font=\bfseries] 

\tikzstyle{multi attribute} = [attribute, double, double distance=2pt] 

\tikzstyle{derived attribute} = [attribute, dashed] 

%\tikzstyle{discriminator} = [attribute, font=\itshape] 

\tikzstyle{relationship} = [diamond, draw, black, very thick, 
         minimum width=2em, aspect=1, 
         every relationship] 

\tikzstyle{ident relationship} = [relationship, double, double distance=2pt] 

\tikzstyle{isa} = [isosceles triangle, isosceles triangle apex angle=60, 
       shape border rotate=-90, 
       draw, black, very thick, minimum size=3em, 
       every isa] 

% for text un key attributes 
\newcommand{\key}[1]{\underline{#1}} 

% for text in discriminator attributes 
\def\discriminator{\bgroup 
    \ifdim\ULdepth=\maxdimen % Set depth based on font, if not set already 
    \settodepth\ULdepth{(j}\advance\ULdepth.4pt\fi 
    \markoverwith{\kern.15em 
    \vtop{\kern\ULdepth \hrule width .3em}% 
    \kern.15em}\ULon} 

貝斯特，馬特烏斯。