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| <h1>Source code for superset.jinja_context</h1><div class="highlight"><pre> |
| <span></span><span class="c1"># -*- coding: utf-8 -*-</span> |
| <span class="sd">"""Defines the templating context for SQL Lab"""</span> |
| <span class="kn">from</span> <span class="nn">__future__</span> <span class="k">import</span> <span class="n">absolute_import</span> |
| <span class="kn">from</span> <span class="nn">__future__</span> <span class="k">import</span> <span class="n">division</span> |
| <span class="kn">from</span> <span class="nn">__future__</span> <span class="k">import</span> <span class="n">print_function</span> |
| <span class="kn">from</span> <span class="nn">__future__</span> <span class="k">import</span> <span class="n">unicode_literals</span> |
| |
| <span class="kn">from</span> <span class="nn">datetime</span> <span class="k">import</span> <span class="n">datetime</span><span class="p">,</span> <span class="n">timedelta</span> |
| <span class="kn">import</span> <span class="nn">inspect</span> |
| <span class="kn">import</span> <span class="nn">json</span> |
| <span class="kn">import</span> <span class="nn">random</span> |
| <span class="kn">import</span> <span class="nn">time</span> |
| <span class="kn">import</span> <span class="nn">uuid</span> |
| |
| <span class="kn">from</span> <span class="nn">dateutil.relativedelta</span> <span class="k">import</span> <span class="n">relativedelta</span> |
| <span class="kn">from</span> <span class="nn">flask</span> <span class="k">import</span> <span class="n">g</span><span class="p">,</span> <span class="n">request</span> |
| <span class="kn">from</span> <span class="nn">jinja2.sandbox</span> <span class="k">import</span> <span class="n">SandboxedEnvironment</span> |
| |
| <span class="kn">from</span> <span class="nn">superset</span> <span class="k">import</span> <span class="n">app</span> |
| |
| <span class="n">config</span> <span class="o">=</span> <span class="n">app</span><span class="o">.</span><span class="n">config</span> |
| <span class="n">BASE_CONTEXT</span> <span class="o">=</span> <span class="p">{</span> |
| <span class="s1">'datetime'</span><span class="p">:</span> <span class="n">datetime</span><span class="p">,</span> |
| <span class="s1">'random'</span><span class="p">:</span> <span class="n">random</span><span class="p">,</span> |
| <span class="s1">'relativedelta'</span><span class="p">:</span> <span class="n">relativedelta</span><span class="p">,</span> |
| <span class="s1">'time'</span><span class="p">:</span> <span class="n">time</span><span class="p">,</span> |
| <span class="s1">'timedelta'</span><span class="p">:</span> <span class="n">timedelta</span><span class="p">,</span> |
| <span class="s1">'uuid'</span><span class="p">:</span> <span class="n">uuid</span><span class="p">,</span> |
| <span class="p">}</span> |
| <span class="n">BASE_CONTEXT</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">config</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">'JINJA_CONTEXT_ADDONS'</span><span class="p">,</span> <span class="p">{}))</span> |
| |
| |
| <div class="viewcode-block" id="url_param"><a class="viewcode-back" href="../../sqllab.html#superset.jinja_context.url_param">[docs]</a><span class="k">def</span> <span class="nf">url_param</span><span class="p">(</span><span class="n">param</span><span class="p">,</span> <span class="n">default</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> |
| <span class="sd">"""Get a url or post data parameter</span> |
| |
| <span class="sd"> :param param: the parameter to lookup</span> |
| <span class="sd"> :type param: str</span> |
| <span class="sd"> :param default: the value to return in the absence of the parameter</span> |
| <span class="sd"> :type default: str</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="n">request</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">param</span><span class="p">):</span> |
| <span class="k">return</span> <span class="n">request</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">param</span><span class="p">,</span> <span class="n">default</span><span class="p">)</span> |
| <span class="c1"># Supporting POST as well as get</span> |
| <span class="k">if</span> <span class="n">request</span><span class="o">.</span><span class="n">form</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">'form_data'</span><span class="p">):</span> |
| <span class="n">form_data</span> <span class="o">=</span> <span class="n">json</span><span class="o">.</span><span class="n">loads</span><span class="p">(</span><span class="n">request</span><span class="o">.</span><span class="n">form</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">'form_data'</span><span class="p">))</span> |
| <span class="n">url_params</span> <span class="o">=</span> <span class="n">form_data</span><span class="p">[</span><span class="s1">'url_params'</span><span class="p">]</span> <span class="ow">or</span> <span class="p">{}</span> |
| <span class="k">return</span> <span class="n">url_params</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">param</span><span class="p">,</span> <span class="n">default</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">default</span></div> |
| |
| |
| <span class="k">def</span> <span class="nf">current_user_id</span><span class="p">():</span> |
| <span class="sd">"""The id of the user who is currently logged in"""</span> |
| <span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">g</span><span class="p">,</span> <span class="s1">'user'</span><span class="p">)</span> <span class="ow">and</span> <span class="n">g</span><span class="o">.</span><span class="n">user</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">g</span><span class="o">.</span><span class="n">user</span><span class="o">.</span><span class="n">id</span> |
| |
| |
| <span class="k">def</span> <span class="nf">current_username</span><span class="p">():</span> |
| <span class="sd">"""The username of the user who is currently logged in"""</span> |
| <span class="k">if</span> <span class="n">g</span><span class="o">.</span><span class="n">user</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">g</span><span class="o">.</span><span class="n">user</span><span class="o">.</span><span class="n">username</span> |
| |
| |
| <span class="k">class</span> <span class="nc">BaseTemplateProcessor</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span> |
| |
| <span class="sd">"""Base class for database-specific jinja context</span> |
| |
| <span class="sd"> There's this bit of magic in ``process_template`` that instantiates only</span> |
| <span class="sd"> the database context for the active database as a ``models.Database``</span> |
| <span class="sd"> object binds it to the context object, so that object methods</span> |
| <span class="sd"> have access to</span> |
| <span class="sd"> that context. This way, {{ hive.latest_partition('mytable') }} just</span> |
| <span class="sd"> knows about the database it is operating in.</span> |
| |
| <span class="sd"> This means that object methods are only available for the active database</span> |
| <span class="sd"> and are given access to the ``models.Database`` object and schema</span> |
| <span class="sd"> name. For globally available methods use ``@classmethod``.</span> |
| <span class="sd"> """</span> |
| <span class="n">engine</span> <span class="o">=</span> <span class="kc">None</span> |
| |
| <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">database</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">query</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">database</span> <span class="o">=</span> <span class="n">database</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">query</span> <span class="o">=</span> <span class="n">query</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">schema</span> <span class="o">=</span> <span class="kc">None</span> |
| <span class="k">if</span> <span class="n">query</span> <span class="ow">and</span> <span class="n">query</span><span class="o">.</span><span class="n">schema</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">schema</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">schema</span> |
| <span class="k">elif</span> <span class="n">table</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">schema</span> <span class="o">=</span> <span class="n">table</span><span class="o">.</span><span class="n">schema</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">context</span> <span class="o">=</span> <span class="p">{</span> |
| <span class="s1">'url_param'</span><span class="p">:</span> <span class="n">url_param</span><span class="p">,</span> |
| <span class="s1">'current_user_id'</span><span class="p">:</span> <span class="n">current_user_id</span><span class="p">,</span> |
| <span class="s1">'current_username'</span><span class="p">:</span> <span class="n">current_username</span><span class="p">,</span> |
| <span class="s1">'form_data'</span><span class="p">:</span> <span class="p">{},</span> |
| <span class="p">}</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">context</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">kwargs</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">context</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">BASE_CONTEXT</span><span class="p">)</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">engine</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">context</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">engine</span><span class="p">]</span> <span class="o">=</span> <span class="bp">self</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">env</span> <span class="o">=</span> <span class="n">SandboxedEnvironment</span><span class="p">()</span> |
| |
| <span class="k">def</span> <span class="nf">process_template</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">sql</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> |
| <span class="sd">"""Processes a sql template</span> |
| |
| <span class="sd"> >>> sql = "SELECT '{{ datetime(2017, 1, 1).isoformat() }}'"</span> |
| <span class="sd"> >>> process_template(sql)</span> |
| <span class="sd"> "SELECT '2017-01-01T00:00:00'"</span> |
| <span class="sd"> """</span> |
| <span class="n">template</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">env</span><span class="o">.</span><span class="n">from_string</span><span class="p">(</span><span class="n">sql</span><span class="p">)</span> |
| <span class="n">kwargs</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">context</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">template</span><span class="o">.</span><span class="n">render</span><span class="p">(</span><span class="n">kwargs</span><span class="p">)</span> |
| |
| |
| <div class="viewcode-block" id="PrestoTemplateProcessor"><a class="viewcode-back" href="../../sqllab.html#superset.jinja_context.PrestoTemplateProcessor">[docs]</a><span class="k">class</span> <span class="nc">PrestoTemplateProcessor</span><span class="p">(</span><span class="n">BaseTemplateProcessor</span><span class="p">):</span> |
| <span class="sd">"""Presto Jinja context</span> |
| |
| <span class="sd"> The methods described here are namespaced under ``presto`` in the</span> |
| <span class="sd"> jinja context as in ``SELECT '{{ presto.some_macro_call() }}'``</span> |
| <span class="sd"> """</span> |
| <span class="n">engine</span> <span class="o">=</span> <span class="s1">'presto'</span> |
| |
| <span class="nd">@staticmethod</span> |
| <span class="k">def</span> <span class="nf">_schema_table</span><span class="p">(</span><span class="n">table_name</span><span class="p">,</span> <span class="n">schema</span><span class="p">):</span> |
| <span class="k">if</span> <span class="s1">'.'</span> <span class="ow">in</span> <span class="n">table_name</span><span class="p">:</span> |
| <span class="n">schema</span><span class="p">,</span> <span class="n">table_name</span> <span class="o">=</span> <span class="n">table_name</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">'.'</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">table_name</span><span class="p">,</span> <span class="n">schema</span> |
| |
| <span class="k">def</span> <span class="nf">latest_partition</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">table_name</span><span class="p">):</span> |
| <span class="n">table_name</span><span class="p">,</span> <span class="n">schema</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_schema_table</span><span class="p">(</span><span class="n">table_name</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span><span class="p">)</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">database</span><span class="o">.</span><span class="n">db_engine_spec</span><span class="o">.</span><span class="n">latest_partition</span><span class="p">(</span> |
| <span class="n">table_name</span><span class="p">,</span> <span class="n">schema</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">database</span><span class="p">)[</span><span class="mi">1</span><span class="p">]</span> |
| |
| <span class="k">def</span> <span class="nf">latest_sub_partition</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">table_name</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> |
| <span class="n">table_name</span><span class="p">,</span> <span class="n">schema</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_schema_table</span><span class="p">(</span><span class="n">table_name</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span><span class="p">)</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">database</span><span class="o">.</span><span class="n">db_engine_spec</span><span class="o">.</span><span class="n">latest_sub_partition</span><span class="p">(</span> |
| <span class="n">table_name</span><span class="o">=</span><span class="n">table_name</span><span class="p">,</span> |
| <span class="n">schema</span><span class="o">=</span><span class="n">schema</span><span class="p">,</span> |
| <span class="n">database</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">database</span><span class="p">,</span> |
| <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span></div> |
| |
| |
| <span class="k">class</span> <span class="nc">HiveTemplateProcessor</span><span class="p">(</span><span class="n">PrestoTemplateProcessor</span><span class="p">):</span> |
| <span class="n">engine</span> <span class="o">=</span> <span class="s1">'hive'</span> |
| |
| |
| <span class="n">template_processors</span> <span class="o">=</span> <span class="p">{}</span> |
| <span class="n">keys</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span><span class="nb">globals</span><span class="p">()</span><span class="o">.</span><span class="n">keys</span><span class="p">())</span> |
| <span class="k">for</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">keys</span><span class="p">:</span> |
| <span class="n">o</span> <span class="o">=</span> <span class="nb">globals</span><span class="p">()[</span><span class="n">k</span><span class="p">]</span> |
| <span class="k">if</span> <span class="n">o</span> <span class="ow">and</span> <span class="n">inspect</span><span class="o">.</span><span class="n">isclass</span><span class="p">(</span><span class="n">o</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">issubclass</span><span class="p">(</span><span class="n">o</span><span class="p">,</span> <span class="n">BaseTemplateProcessor</span><span class="p">):</span> |
| <span class="n">template_processors</span><span class="p">[</span><span class="n">o</span><span class="o">.</span><span class="n">engine</span><span class="p">]</span> <span class="o">=</span> <span class="n">o</span> |
| |
| |
| <span class="k">def</span> <span class="nf">get_template_processor</span><span class="p">(</span><span class="n">database</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">query</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> |
| <span class="n">TP</span> <span class="o">=</span> <span class="n">template_processors</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">database</span><span class="o">.</span><span class="n">backend</span><span class="p">,</span> <span class="n">BaseTemplateProcessor</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">TP</span><span class="p">(</span><span class="n">database</span><span class="o">=</span><span class="n">database</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">table</span><span class="p">,</span> <span class="n">query</span><span class="o">=</span><span class="n">query</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> |
| </pre></div> |
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