def get_construction_dates():
"""Return summary information of construction start and end dates
"""
query = {
"aggs" : {
"construction_years" : {
"terms" : {
"field" : "construction_start",
"order" : { "_term" : "asc" },
"size": 250
}
},
"num_construction_years" : {
"cardinality" : {
"field" : "construction_start"
}
},
"construction_decades": {
"histogram": {
"field" : "construction_start",
"interval": 10
}
},
"construction_end_decades": {
"histogram": {
"field" : "construction_end",
"interval": 10
}
}
},
"size": 0
}
return es.search(query)
def get_records_geogrid(precision, keyword=None, bounds=None):
"""Return geohash grids containing records
"""
query = {
"aggregations" : {
"geogrid" : {
"geohash_grid" : {
"field" : "geolocation",
"precision" : precision
}
}
}
}
return es.search(query)
def get_locations(num_results=1000, keyword=None, bounds=None,
lga_name=None, suburb=None):
"""Return a set of locations matching the arguments
"""
query = {
"size": num_results,
"fields": ("geolocation.lat", "geolocation.lon", "name"),
"filter": {
"and": [
{
"exists": {"field": "geolocation"}
}
]
}
}
if keyword:
query['query'] = {
"match": {
"_all": keyword
}
}
if bounds:
query['filter']['and'].append({
"geo_bounding_box" : {
"geolocation" : bounds
}
})
if lga_name:
query['filter']['and'].append({
"term": {
"addresses.lga_name": lga_name
}
})
if suburb:
query['filter']['and'].append({
"term": {
"addresses.suburb": suburb
}
})
return es.search(query)
def get_field_values(field, num_results=5000):
query = {
"aggs": {
"field_values": { # Defined name
"terms": {
"field": field,
"size": num_results
}
}
},
"filter": {
# // "term": {
# // "addresses.lga_name": "YARRA CITY"
# // }
},
"size": 0
}
es_results = es.search(query)
results = [{"val": bucket['key'], "num": bucket['doc_count']}
for bucket in es_results['aggregations']['field_values']['buckets'] ]
return results
def _query_field_plus_geo_bounds(field_type, field_name,
max_results=5000, extra_filter=None,
keyword=None, bounds=None):
query = {
"aggs": {
"field_query": {
"terms": {
"field": field_name,
"size": max_results
},
"aggs": {
"center_lat": {
"avg": {
"field": "geolocation.lat"
}
},
"center_lon": {
"avg": {
"field": "geolocation.lon"
}
},
"north": {
"max": {"field": "geolocation.lat"}
},
"south": {
"min": {"field": "geolocation.lat"}
},
"east": {
"max": {"field": "geolocation.lon"}
},
"west": {
"min": {"field": "geolocation.lon"}
}
}
}
},
"query": {
"filtered": {
"filter": {
"and": [
{
"exists": {"field": "geolocation"}
}]
}
}
},
"size": 0
}
if bounds:
query['query']['filtered']['filter']['and'].append({
"geo_bounding_box" : {
"geolocation" : bounds
}
})
if extra_filter:
query['query']['filtered']['filter']['and'].append(extra_filter)
if keyword:
query['query']['filtered']['query'] = {
'match': {
'_all': keyword
}
}
results = es.search(query)
places = {
field_type: [{
"name": p['key'],
"record_count": p['doc_count'],
"weighted_center": {
"lat": p['center_lat']['value'],
"lon": p['center_lon']['value']
},
"bounds": {
"n": p['north']['value'],
"s": p['south']['value'],
"e": p['east']['value'],
"w": p['west']['value']
}
} for p in results['aggregations']['field_query']['buckets']]
}
return places