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<title>bento_meta.mdb.writeable — bento-meta documentation</title> | ||
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<h1>Source code for bento_meta.mdb.writeable</h1><div class="highlight"><pre> | ||
<span></span><span class="sd">"""</span> | ||
<span class="sd">mdb.writeable: subclass of `class:bento_meta.MDB` to support writing to an MDB</span> | ||
<span class="sd">"""</span> | ||
<span class="kn">from</span> <span class="nn">functools</span> <span class="kn">import</span> <span class="n">wraps</span> | ||
<span class="kn">from</span> <span class="nn">bento_meta.mdb</span> <span class="kn">import</span> <span class="n">make_nanoid</span> | ||
<span class="kn">from</span> <span class="nn">bento_meta.mdb</span> <span class="kn">import</span> <span class="n">MDB</span> | ||
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<div class="viewcode-block" id="write_txn"><a class="viewcode-back" href="../../../autoapi/bento_meta/mdb/writeable/index.html#bento_meta.mdb.write_txn">[docs]</a><span class="k">def</span> <span class="nf">write_txn</span><span class="p">(</span><span class="n">func</span><span class="p">):</span> | ||
<span class="w"> </span><span class="sd">"""Decorates a query function to run a write transaction based</span> | ||
<span class="sd"> on its query.</span> | ||
<span class="sd"> Query function should return a tuple (qry_string, param_dict)."""</span> | ||
<span class="nd">@wraps</span><span class="p">(</span><span class="n">func</span><span class="p">)</span> | ||
<span class="k">def</span> <span class="nf">wr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> | ||
<span class="k">def</span> <span class="nf">txn_q</span><span class="p">(</span><span class="n">tx</span><span class="p">):</span> | ||
<span class="p">(</span><span class="n">qry</span><span class="p">,</span><span class="n">parms</span><span class="p">)</span><span class="o">=</span><span class="n">func</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> | ||
<span class="n">result</span> <span class="o">=</span> <span class="n">tx</span><span class="o">.</span><span class="n">run</span><span class="p">(</span><span class="n">qry</span><span class="p">,</span><span class="n">parameters</span><span class="o">=</span><span class="n">parms</span><span class="p">)</span> | ||
<span class="k">return</span> <span class="p">[</span><span class="n">rec</span> <span class="k">for</span> <span class="n">rec</span> <span class="ow">in</span> <span class="n">result</span><span class="p">]</span> | ||
<span class="k">with</span> <span class="bp">self</span><span class="o">.</span><span class="n">driver</span><span class="o">.</span><span class="n">session</span><span class="p">()</span> <span class="k">as</span> <span class="n">session</span><span class="p">:</span> | ||
<span class="n">result</span> <span class="o">=</span> <span class="n">session</span><span class="o">.</span><span class="n">write_transaction</span><span class="p">(</span><span class="n">txn_q</span><span class="p">)</span> | ||
<span class="k">return</span> <span class="n">result</span> | ||
<span class="k">return</span> <span class="n">wr</span></div> | ||
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<div class="viewcode-block" id="WriteableMDB"><a class="viewcode-back" href="../../../autoapi/bento_meta/mdb/writeable/index.html#bento_meta.mdb.WriteableMDB">[docs]</a><span class="k">class</span> <span class="nc">WriteableMDB</span><span class="p">(</span><span class="n">MDB</span><span class="p">):</span> | ||
<span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> | ||
<span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> | ||
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<div class="viewcode-block" id="WriteableMDB.put_with_statement"><a class="viewcode-back" href="../../../autoapi/bento_meta/mdb/writeable/index.html#bento_meta.mdb.WriteableMDB.put_with_statement">[docs]</a> <span class="nd">@write_txn</span> | ||
<span class="k">def</span> <span class="nf">put_with_statement</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">qry</span><span class="p">,</span> <span class="n">parms</span><span class="o">=</span><span class="p">{}):</span> | ||
<span class="w"> </span><span class="sd">"""Run an arbitrary write statement."""</span> | ||
<span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">qry</span><span class="p">,</span> <span class="nb">str</span><span class="p">):</span> | ||
<span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span><span class="s2">"qry= must be a string"</span><span class="p">)</span> | ||
<span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parms</span><span class="p">,</span> <span class="nb">dict</span><span class="p">):</span> | ||
<span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span><span class="s2">"parms= must be a dict"</span><span class="p">)</span> | ||
<span class="k">return</span> <span class="p">(</span><span class="n">qry</span><span class="p">,</span> <span class="n">parms</span><span class="p">)</span></div> | ||
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<div class="viewcode-block" id="WriteableMDB.put_term_with_origin"><a class="viewcode-back" href="../../../autoapi/bento_meta/mdb/writeable/index.html#bento_meta.mdb.WriteableMDB.put_term_with_origin">[docs]</a> <span class="nd">@write_txn</span> | ||
<span class="k">def</span> <span class="nf">put_term_with_origin</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">term</span><span class="p">,</span> <span class="n">commit</span><span class="o">=</span><span class="s2">""</span><span class="p">,</span> <span class="n">_from</span><span class="o">=</span><span class="mi">1</span><span class="p">):</span> | ||
<span class="w"> </span><span class="sd">"""Merge a bento-meta Term object, that has an Origin object set,</span> | ||
<span class="sd"> into an MDB. If a new term is created, assign a random 6-char nanoid </span> | ||
<span class="sd"> to it. The Origin must already be represented in the database.</span> | ||
<span class="sd"> :param Term term: Term object</span> | ||
<span class="sd"> :param str commit: GitHub commit SHA1 associated with the term (if any)"""</span> | ||
<span class="n">qry</span> <span class="o">=</span> <span class="p">(</span> | ||
<span class="s2">"match (o:origin {name:$o_name, nanoid:$o_id}) "</span> | ||
<span class="s2">"where not exists(o._to) "</span> | ||
<span class="s2">"merge (t:term {"</span> | ||
<span class="s2">" value:$t_value,"</span> | ||
<span class="s2">" origin_id:$t_oid,"</span> | ||
<span class="s2">" origin_version:$t_oversion,"</span> | ||
<span class="s2">" origin_definition:$t_odefn,"</span> | ||
<span class="s2">" _from:$from, _commit:$commit}) "</span> | ||
<span class="s2">"merge (o)<-[:has_origin]-(t) "</span> | ||
<span class="s2">"on create set t.nanoid = $t_id "</span> | ||
<span class="s2">"return t.nanoid"</span> | ||
<span class="p">)</span> | ||
<span class="n">parms</span> <span class="o">=</span> <span class="p">{</span><span class="s2">"o_name"</span><span class="p">:</span> <span class="n">term</span><span class="o">.</span><span class="n">origin</span><span class="o">.</span><span class="n">name</span><span class="p">,</span> <span class="s2">"o_id"</span><span class="p">:</span> <span class="n">term</span><span class="o">.</span><span class="n">origin</span><span class="o">.</span><span class="n">nanoid</span><span class="p">,</span> | ||
<span class="s2">"t_value"</span><span class="p">:</span> <span class="n">term</span><span class="o">.</span><span class="n">value</span><span class="p">,</span> <span class="s2">"t_oid"</span><span class="p">:</span> <span class="n">term</span><span class="o">.</span><span class="n">origin_id</span><span class="p">,</span> | ||
<span class="s2">"t_oversion"</span><span class="p">:</span> <span class="n">term</span><span class="o">.</span><span class="n">origin_version</span><span class="p">,</span> | ||
<span class="s2">"t_odefn"</span><span class="p">:</span> <span class="n">term</span><span class="o">.</span><span class="n">origin_definition</span><span class="p">,</span> | ||
<span class="s2">"t_id"</span><span class="p">:</span> <span class="n">make_nanoid</span><span class="p">(),</span> <span class="s2">"commit"</span><span class="p">:</span> <span class="n">commit</span><span class="p">,</span> | ||
<span class="s2">"from"</span><span class="p">:</span><span class="n">_from</span><span class="p">}</span> | ||
<span class="k">return</span> <span class="p">(</span><span class="n">qry</span><span class="p">,</span> <span class="n">parms</span><span class="p">)</span></div></div> | ||
</pre></div> | ||
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