Travel export is missing some of the (aggregated) sections of the Travels

Originally reported on picateam

Export travels doesn't export correctly all the sections of the travels.

• Step to reproduce: import the travelsTemplate.csv travelsTemplate.csv
• Export the file, its content is:

name	type	mode	amount	position	no.person	purpose	round.trip	geodesic.distance.km	corrected.distance.km	distance.km	cumulative.distance.km	emission.kg.co2e	uncertainty.kg.co2e	emission.withcontrails.kg.co2e	uncertainty.withcontrails.kg.co2e	cumulative.emission.kg.co2e	cumulative.uncertainty.kg.co2e	cumulative.emission.withcontrails.kg.co2e	cumulative.uncertainty.withcontrails.kg.co2e
1	NA	busintercity	1	engineer	1	conference	true	77.95622496795087	116.93433745192631	233.86867490385262	233.86867490385262	7.15638145205789	4.293828871234734	7.15638145205789	4.293828871234734	7.15638145205789	4.293828871234734	7.15638145205789	4.293828871234734
2	NA	car	1	engineer	4	conference	true	210.91145866911955	274.1848962698554	137.0924481349277	137.0924481349277	29.557131817890415	17.734279090734248	29.557131817890415	17.734279090734248	29.557131817890415	17.734279090734248	29.557131817890415	17.734279090734248
3	NA	cab	1	researcher	2	seminar	false	80.67419976013144	104.87645968817088	157.31468953225632	157.31468953225632	33.91704706315446	20.35022823789267633.91704706315446	20.350228237892676	33.91704706315446	20.350228237892676	33.91704706315446	20.350228237892676
4	NA	train	1	researcher	1	collaboration	false	314.89405994147825	377.8728719297739	377.8728719297739	377.8728719297739	1.2469804773682538	0.24939609547365077	1.2469804773682538	0.24939609547365077	1.2469804773682538	0.24939609547365077	1.2469804773682538	0.24939609547365077
5	MX	plane	1	student	1	teaching	true	1328.6481756848182	1423.6481756848182	2847.2963513696363	2847.2963513696363	292.41733528566164	29.241733528566165533.8680658818068	373.70764611726474	292.41733528566164	29.241733528566165	533.8680658818068	373.70764611726474
6	NA	train	1	engineer	1	visit	false	110.88507660384035	133.0620919246084	133.0620919246084	133.0620919246084	2.3951176546429513	1.43707059278577082.3951176546429513	1.4370705927857708	2.3951176546429513	1.4370705927857708	2.3951176546429513	1.4370705927857708
7	IN	train	1	engineer	1	visit	false	360.695320608492	432.8343847301904	432.8343847301904	432.8343847301904	16.014872235017044	9.608923341010227	16.014872235017044	9.608923341010227	16.014872235017044	9.608923341010227	16.014872235017044	9.608923341010227
8	MX	train	1	researcher	1	research.management	false	367.474300851029	440.9691610212348	440.9691610212348	440.9691610212348	7.0555065763397575	4.233303945803854	7.0555065763397575	4.233303945803854	7.0555065763397575	4.233303945803854	7.0555065763397575	4.233303945803854
9	MX	plane	1	researcher	1	teaching	false	707.6630904642298	802.6630904642298	802.6630904642298	802.6630904642298	113.65709360973494	11.365709360973495	207.5686751940498	145.29807263583484	113.65709360973494	11.365709360973495	207.5686751940498	145.29807263583484
10	IN	plane	1	researcher	1	teaching	false	2620.797096317504	2715.797096317504	2715.797096317504	2715.797096317504	278.91236179180765	27.891236179180765	509.211955559532	356.4483688916724	278.91236179180765	27.891236179180765	509.211955559532	356.4483688916724
11	IN	plane	1	researcher	1	teaching	false	3532.298109049438	3627.298109049438	3627.298109049438	3627.298109049438	302.1539324838182	30.215393248381822	551.3493125755145	385.94451880286016	302.1539324838182	30.215393248381822	551.3493125755145	385.94451880286016
12	MX	plane	1	student	1	teaching	false	4785.358712619902	4880.358712619902	4880.358712619902	4880.358712619902	406.5338807612378	40.65338807612378	741.814524318225	519.2701670227575	406.5338807612378	40.65338807612378	741.814524318225	519.2701670227575
13	IN	plane	1	student	1	teaching	true	6311.040951740989	6406.040951740989	12812.081903481978	12812.081903481978	1067.2464225600488	106.724642256004881947.4364493292605	1363.2055145304823	1067.2464225600488	106.72464225600488	1947.4364493292605	1363.2055145304823
14	IN	plane	1	student	1	teaching	true	7679.218208021766	7774.218208021766	15548.436416043533	15548.436416043533	1295.1847534564263	129.518475345642632363.362335238617	1654.3536346670319	1295.1847534564263	129.51847534564263	2363.362335238617	1654.3536346670319
15	MX	plane	1	guest	1	seminar	true	8683.178230086754	8778.178230086754	17556.35646017351	17556.35646017351	1462.4444931324533	146.24444931324533	2668.5661819463735	1867.9963273624612	1462.4444931324533	146.24444931324533	2668.5661819463735	1867.9963273624612
16	MX	plane	1	student	1	teaching	true	9687.860804420288	9782.860804420288	19565.721608840577	19565.721608840577	1629.82461001642	162.982461001642	2973.9896845437675	2081.792779180637	1629.82461001642	162.982461001642	2973.9896845437675	2081.792779180637
17	IN	plane	1	student	1	teaching	true	10168.744366299476	10263.744366299476	20527.48873259895	20527.48873259895	1709.9398114254925	170.993981142549273120.1782873550405	2184.124801148528	1709.9398114254925	170.99398114254927	3120.1782873550405	2184.124801148528
18	MX	plane	1	guest	1	seminar	true	19061.922736075598	19156.922736075598	38313.845472151195	38313.845472151195	3191.5433278301944	319.15433278301947	5823.704511766981	4076.5931582368867	3191.5433278301944	319.15433278301947	5823.704511766981	4076.5931582368867
19	IN	plane	1	guest	1	seminar	true	16376.907397593073	16471.907397593073	32943.81479518615	32943.81479518615	2744.219772439006	274.42197724390064	5007.459848868294	3505.2218942078057	2744.219772439006	274.42197724390064	5007.459848868294	3505.2218942078057
20	IN	ferry	1	researcher	1	teaching	true	1566.4698994567818	1566.4698994567818	3132.9397989135637	3132.9397989135637	3067.148063136379	1840.2888378818272	3067.148063136379	1840.2888378818272	3067.148063136379	1840.2888378818272	3067.148063136379	1840.28883788182

We got 20 sections instead of 37 (unique) sections (when accounting with round-trips and amount)

Hints:

This code seems to export a single line per travels (regardless the number of section)

Todo

• Add some tests in Travel.test.js
• Fix the implementation (introducing travel.toString or something that calls the section.toString(without the travel parameter) would be better designed.