As you can read on the documentation, no, you can't assign a value in a loop and use it outside the loop, unless you use a namespace:
http://jinja.pocoo.org/docs/2.10/templates/#assignments (see: Scoping Behavior) On Thu, Jan 3, 2019 at 3:30 AM Simon Jones <batmanu...@gmail.com> wrote: > Hi all, > > I'm using Jinja2 template to generate config files, but I found a BUG, > which is I could not assign value in a loop, like this: > > 1) use this template, could generate 'uuusevrf' > > {% block vrf_mgmt_interface %} > {% set usevrf = 'no' %} > {% set usevrf = 'nono' %} > {% if MGMT_INTERFACE %} > {% set uuusevrf = 'yes' %} > {% for (name, prefix) in MGMT_INTERFACE %} > {% if name == 'eth0' %} > {% if MGMT_INTERFACE[(name, prefix)].has_key('vrfname') %} > {% if prefix | ipv4 %} > USE_VRF=2 > IP_VERSION=4 > ETH_NAME=eth0 > ETH_IP={{ prefix | ip }} > ETH_SUB_NET={{ prefix | network }}/{{ prefix | prefixlen }} > ETH_LOOKUP_IP={{ prefix | ip }} > VRFNAME={{ MGMT_INTERFACE[(name, prefix)]['vrfname'] }} > GWADDR={{ MGMT_INTERFACE[(name, prefix)]['gwaddr'] }} > {% else %} > USE_VRF=2 > IP_VERSION=6 > ETH_NAME=eth0 > ETH_IP={{ prefix | ip }} > ETH_SUB_NET={{ prefix | network }}/{{ prefix | prefixlen }} > ETH_LOOKUP_IP={{ prefix | ip }} > VRFNAME={{ MGMT_INTERFACE[(name, prefix)]['vrfname'] }} > GWADDR={{ MGMT_INTERFACE[(name, prefix)]['gwaddr'] }} > {% endif %} > {% else %} > USE_VRF=1 > {% endif %} > {% endif %} > {% endfor %} > {% endif %} > {{ usevrf }} > {{ uuusevrf }} > {% endblock vrf_mgmt_interface %} > > > 2) could generate 'uuusevrf', this is result: > > rfaces.j211:~# sonic-cfggen -d -t > /usr/share/sonic/templates/vrf_management_inter > USE_VRF=2 > IP_VERSION=4 > ETH_NAME=eth0 > ETH_IP=172.18.8.211 > ETH_SUB_NET=172.18.8.0/24 > ETH_LOOKUP_IP=172.18.8.211 > VRFNAME=mgmtvrf > GWADDR=172.18.8.1 > nono > yes > > > 2) use this template, could NOT generate 'uuusevrf' > > {% block vrf_mgmt_interface %} > {% set usevrf = 'no' %} > {% set usevrf = 'nono' %} > {% if MGMT_INTERFACE %} > {% for (name, prefix) in MGMT_INTERFACE %} > {% set uuusevrf = 'yes' %} > {% if name == 'eth0' %} > {% if MGMT_INTERFACE[(name, prefix)].has_key('vrfname') %} > {% if prefix | ipv4 %} > USE_VRF=2 > IP_VERSION=4 > ETH_NAME=eth0 > ETH_IP={{ prefix | ip }} > ETH_SUB_NET={{ prefix | network }}/{{ prefix | prefixlen }} > ETH_LOOKUP_IP={{ prefix | ip }} > VRFNAME={{ MGMT_INTERFACE[(name, prefix)]['vrfname'] }} > GWADDR={{ MGMT_INTERFACE[(name, prefix)]['gwaddr'] }} > {% else %} > USE_VRF=2 > IP_VERSION=6 > ETH_NAME=eth0 > ETH_IP={{ prefix | ip }} > ETH_SUB_NET={{ prefix | network }}/{{ prefix | prefixlen }} > ETH_LOOKUP_IP={{ prefix | ip }} > VRFNAME={{ MGMT_INTERFACE[(name, prefix)]['vrfname'] }} > GWADDR={{ MGMT_INTERFACE[(name, prefix)]['gwaddr'] }} > {% endif %} > {% else %} > USE_VRF=1 > {% endif %} > {% endif %} > {% endfor %} > {% endif %} > {{ usevrf }} > {{ uuusevrf }} > {% endblock vrf_mgmt_interface %} > > 4) could NOT generate, this is result: > > rfaces.j211:~# sonic-cfggen -d -t > /usr/share/sonic/templates/vrf_management_inter > USE_VRF=2 > IP_VERSION=4 > ETH_NAME=eth0 > ETH_IP=172.18.8.211 > ETH_SUB_NET=172.18.8.0/24 > ETH_LOOKUP_IP=172.18.8.211 > VRFNAME=mgmtvrf > GWADDR=172.18.8.1 > nono > > So, why ??? > > You could see that, same data, just the position of this line ({% set > uuusevrf = 'yes' %}) is different. And the result show it definitely go > into loop, but why this line NOT work ??? > > BTW, It's hard to debug !!!!!! > > -- > You received this message because you are subscribed to the Google Groups > "pocoo-libs" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to pocoo-libs+unsubscr...@googlegroups.com. > To post to this group, send email to pocoo-libs@googlegroups.com. > Visit this group at https://groups.google.com/group/pocoo-libs. > For more options, visit https://groups.google.com/d/optout. > -- Juan Pablo Scaletti -- You received this message because you are subscribed to the Google Groups "pocoo-libs" group. To unsubscribe from this group and stop receiving emails from it, send an email to pocoo-libs+unsubscr...@googlegroups.com. To post to this group, send email to pocoo-libs@googlegroups.com. Visit this group at https://groups.google.com/group/pocoo-libs. For more options, visit https://groups.google.com/d/optout.
