skylarmt/postserve
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Merge 68b450077786f14534ecf0f0b35542ec2bcbc170 into 66d17625d85aa144e82702dbd1cf31aadf3d094d

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Andrzej (Andy) 2019-06-11 15:35:32 +00:00 committed by GitHub
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1 changed files with 3 additions and 2 deletions
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server.py
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@ -26,10 +26,11 @@ def GeneratePrepared(layers):
queries = []
prepared = "PREPARE gettile(geometry, numeric, numeric, numeric) AS "
for layer in layers['Layer']:
geometry_field = layer['Datasource']['geometry_field']
layer_query = layer['Datasource']['table'].lstrip().rstrip() # Remove lead and trailing whitespace
layer_query = layer_query[1:len(layer_query)-6] # Remove enough characters to remove first and last () and "AS t"
layer_query = layer_query.replace("geometry", "ST_AsMVTGeom(geometry,!bbox!,4096,0,true) AS mvtgeometry")
base_query = "SELECT ST_ASMVT('"+layer['id']+"', 4096, 'mvtgeometry', tile) FROM ("+layer_query+" WHERE ST_AsMVTGeom(geometry, !bbox!,4096,0,true) IS NOT NULL) AS tile"
layer_query = layer_query.replace("geometry", "ST_AsMVTGeom("+geometry_field+",!bbox!,4096,0,true) AS mvtgeometry")
base_query = "SELECT ST_ASMVT('"+layer['id']+"', 4096, 'mvtgeometry', tile) FROM ("+layer_query+" WHERE ST_AsMVTGeom("+geometry_field+", !bbox!,4096,0,true) IS NOT NULL) AS tile"
queries.append(base_query.replace("!bbox!","$1").replace("!scale_denominator!","$2").replace("!pixel_width!","$3").replace("!pixel_height!","$4"))
prepared = prepared + " UNION ALL ".join(queries) + ";"
print(prepared)