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Update Feature with ArcGIS API for Python

PierreWeisse1

Hello, I work with ArcGIS API for Python on a service hosted in AGOL. I would like to update a field based on another field. I have tried many times, I do not understand how to do it. The example in the API is based on the update between two documents.

Someone to help me ?

Thank you

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Accepted answers

simoxu

Hope the following code snippet gives you some clue:

<SPAN class="keyword token">from</SPAN> arcgis<SPAN class="punctuation token">.</SPAN>gis <SPAN class="keyword token">import</SPAN> GIS
<SPAN class="keyword token">from</SPAN> arcgis<SPAN class="punctuation token">.</SPAN>features <SPAN class="keyword token">import</SPAN> FeatureSet<SPAN class="punctuation token">,</SPAN> Feature

gis <SPAN class="operator token">=</SPAN> GIS<SPAN class="punctuation token">(</SPAN>url<SPAN class="operator token">=</SPAN><SPAN class="string token">""</SPAN><SPAN class="punctuation token">,</SPAN>username<SPAN class="operator token">=</SPAN><SPAN class="string token">""</SPAN><SPAN class="punctuation token">,</SPAN>password<SPAN class="operator token">=</SPAN><SPAN class="string token">""</SPAN><SPAN class="punctuation token">)</SPAN>
fs<SPAN class="operator token">=</SPAN>gis<SPAN class="punctuation token">.</SPAN>content<SPAN class="punctuation token">.</SPAN>get<SPAN class="punctuation token">(</SPAN>itemId<SPAN class="punctuation token">)</SPAN>

<SPAN class="comment token"># assume the first layer is the layer you want to update</SPAN>
fl<SPAN class="operator token">=</SPAN>fs<SPAN class="punctuation token">.</SPAN>layers<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN>

<SPAN class="comment token"># set return_geometry false will save you time and data </SPAN>
features<SPAN class="operator token">=</SPAN>fl<SPAN class="punctuation token">.</SPAN>query<SPAN class="punctuation token">(</SPAN>where<SPAN class="operator token">=</SPAN>sql_where<SPAN class="punctuation token">,</SPAN>out_fields<SPAN class="operator token">=</SPAN><SPAN class="string token">'OBJECTID,FieldName'</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="punctuation token">,</SPAN>return_geometry<SPAN class="operator token">=</SPAN><SPAN class="token boolean">False</SPAN><SPAN class="punctuation token">)</SPAN>

<SPAN class="keyword token">for</SPAN> feature <SPAN class="keyword token">in</SPAN> features<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp; <SPAN class="comment token"># Calculate the new value and assign it to the field in the current record</SPAN>
&nbsp;&nbsp; feature<SPAN class="punctuation token">.</SPAN>set_value<SPAN class="punctuation token">(</SPAN><SPAN class="string token">'FieldName'</SPAN><SPAN class="punctuation token">,</SPAN>NewValue<SPAN class="punctuation token">)</SPAN>

<SPAN class="comment token"># update the features in AGOL</SPAN>
results <SPAN class="operator token">=</SPAN> fl<SPAN class="punctuation token">.</SPAN>edit_features<SPAN class="punctuation token">(</SPAN>updates<SPAN class="operator token">=</SPAN>features<SPAN class="punctuation token">)</SPAN>
‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

All comments

JonathanPollack1

Very nicely done. I wish the Esri help documentation on this topic was this straightforward and to the point.

PierreWeisse1

Hello Simo,

Maybe you can help me on this point. I'm still working with this web service, hosted under AGOL and with ArcGIS API for Python.

On a field of type 'date', I would like to empty the field of its contents.

However when I try, here is the result 1/1/1900 11h05

Do you have an idea ?

Thank you

simoxu

You are welcome, thank you

PierreWeisse1

Thank you Simo Xu

Have a good day

simoxu

Hope the following code snippet gives you some clue:

<SPAN class="keyword token">from</SPAN> arcgis<SPAN class="punctuation token">.</SPAN>gis <SPAN class="keyword token">import</SPAN> GIS
<SPAN class="keyword token">from</SPAN> arcgis<SPAN class="punctuation token">.</SPAN>features <SPAN class="keyword token">import</SPAN> FeatureSet<SPAN class="punctuation token">,</SPAN> Feature

gis <SPAN class="operator token">=</SPAN> GIS<SPAN class="punctuation token">(</SPAN>url<SPAN class="operator token">=</SPAN><SPAN class="string token">""</SPAN><SPAN class="punctuation token">,</SPAN>username<SPAN class="operator token">=</SPAN><SPAN class="string token">""</SPAN><SPAN class="punctuation token">,</SPAN>password<SPAN class="operator token">=</SPAN><SPAN class="string token">""</SPAN><SPAN class="punctuation token">)</SPAN>
fs<SPAN class="operator token">=</SPAN>gis<SPAN class="punctuation token">.</SPAN>content<SPAN class="punctuation token">.</SPAN>get<SPAN class="punctuation token">(</SPAN>itemId<SPAN class="punctuation token">)</SPAN>

<SPAN class="comment token"># assume the first layer is the layer you want to update</SPAN>
fl<SPAN class="operator token">=</SPAN>fs<SPAN class="punctuation token">.</SPAN>layers<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN>

<SPAN class="comment token"># set return_geometry false will save you time and data </SPAN>
features<SPAN class="operator token">=</SPAN>fl<SPAN class="punctuation token">.</SPAN>query<SPAN class="punctuation token">(</SPAN>where<SPAN class="operator token">=</SPAN>sql_where<SPAN class="punctuation token">,</SPAN>out_fields<SPAN class="operator token">=</SPAN><SPAN class="string token">'OBJECTID,FieldName'</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="punctuation token">,</SPAN>return_geometry<SPAN class="operator token">=</SPAN><SPAN class="token boolean">False</SPAN><SPAN class="punctuation token">)</SPAN>

<SPAN class="keyword token">for</SPAN> feature <SPAN class="keyword token">in</SPAN> features<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp; <SPAN class="comment token"># Calculate the new value and assign it to the field in the current record</SPAN>
&nbsp;&nbsp; feature<SPAN class="punctuation token">.</SPAN>set_value<SPAN class="punctuation token">(</SPAN><SPAN class="string token">'FieldName'</SPAN><SPAN class="punctuation token">,</SPAN>NewValue<SPAN class="punctuation token">)</SPAN>

<SPAN class="comment token"># update the features in AGOL</SPAN>
results <SPAN class="operator token">=</SPAN> fl<SPAN class="punctuation token">.</SPAN>edit_features<SPAN class="punctuation token">(</SPAN>updates<SPAN class="operator token">=</SPAN>features<SPAN class="punctuation token">)</SPAN>
‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

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